Abstract

GeoDCAT-AP is an extension of the DCAT application profile for data portals in Europe ([[[DCAT-AP-3]]]) for describing geospatial datasets, dataset series, and services. Its basic use case is to make spatial datasets, dataset series, and services searchable on general data portals, thereby making geospatial information better findable across borders and sectors. For this purpose, GeoDCAT-AP provides an RDF vocabulary and the corresponding RDF syntax binding for the union of metadata elements of the core profile of ISO 19115:2003 [[ISO-19115]], those defined in the framework of the INSPIRE Directive [[INSPIRE-DIR]] of the European Union and those defined in the Technical Guidance for the implementation of INSPIRE dataset and service metadata based on ISO/TS 19139:2007 [[INSPIRE-MD]].

Introduction

This document contains version 3.0.0 of the specification for GeoDCAT-AP, an extension of the DCAT application profile for data portals in Europe [[DCAT-AP-3]] for describing geospatial datasets, dataset series, and services.

Its basic use case is to make spatial datasets, dataset series, and services searchable on general data portals, thereby making geospatial information better findable across borders and sectors. For this purpose, GeoDCAT-AP provides an RDF vocabulary and the corresponding RDF syntax binding for the union of metadata elements of the core profile of ISO 19115:2003 [[ISO-19115]], its XML metadata encoding standard, ISO/TS 19139:2007 [[ISO-19139]], and those defined in the framework of the INSPIRE Directive [[INSPIRE-DIR]].

The GeoDCAT-AP specification does not replace the INSPIRE Metadata Regulation [[?INSPIRE-MD-REG]] nor the INSPIRE Metadata technical guidelines [[INSPIRE-MD]] based on ISO 19115 and ISO 19119. Its purpose is to give producers and maintainers of geospatial metadata the possibility to achieve more by providing the means of an additional implementation through harmonised RDF syntax bindings used in the Open Data community. Conversion rules to RDF syntax would allow Member States to maintain their collections of INSPIRE-relevant datasets following the INSPIRE Metadata technical guidelines based on [[ISO-19115]] and [[ISO-19119]], while at the same time publishing these collections on [[DCAT-AP-3]]-conformant data portals. A conversion to an RDF representation allows additional metadata elements to be displayed on general-purposed open data portals, provided that such data portals are capable of displaying additional metadata elements. Additionally, data portals may be capable of providing machine-to-machine interfaces where additional metadata could be provided.

Context

With a view to fostering Europe's digital transformation, the European Commission is investing in frameworks and agreements to provide governments and businesses with the appropriate resources to digitalise their services. There are, for instance, building blocks available for creating a single market for data, where data flows freely within the EU and across sectors for the benefit of businesses, researchers and public administrations.

To this direction, the European Commission launched the European Data Strategy [[DataStrategy]], as part of the European Commission's priorities for 2019-2024 in order to make the EU a leader in a data-driven society.

Studies previously conducted on behalf of the European Commission (e.g., [[Vickery]]) shed light on the importance of having data findable and available in machine readable format in order to stimulate its reuse. This vision led to several legislative actions to reduce barriers and promote data sharing, such as the Open Data Directive [[OPENDATA-DIR]], which turned out to be a driving force towards a more transparent and fair access to government data.

With this regard, the wide range of (open) data portals developed by European public administrations is the result of this mission. These Web-based interfaces allow access to data by providing users means to explore a catalogue of datasets. To facilitate the sharing, discovery and re-use of the data beyond the (open) data portal, common agreements for the exchange of catalogues of datasets are needed. These interoperability agreements enable to connect (open) data catalogues into a pan-european catalogue of datasets.

The DCAT Application Profile specifies the generic agreements for (open) data portals operated by public administrations in Europe. This specification extends DCAT-AP with additional requirements for describing geospatial data.

The current document is the result of the major semantic change release process described in the Change and Release Management Policy for DCAT-AP [[DCAT-AP-CRMP]] and was built starting from GeoDCAT-AP version 2.0.0 [[GeoDCAT-AP-20201223]], with the purpose of aligning it with DCAT-AP version 3.x.x [[DCAT-AP-3]] and with version 2.2.0 of the INSPIRE Metadata Technical Guidelines for the implementation of INSPIRE dataset and service metadata based on ISO/TS 19139:2007 [[INSPIRE-MD]].

This work has been carried out in the context of the European Commission’s Interoperable Europe initiative [[INTEROPERABLE-EUROPE]].

Scope of the Application Profile

The objective of this work is to produce an updated release of GeoDCAT-AP based on requests for change coming from real-world implementations of the specification and an alignment with [[DCAT-AP-3]] and [[INSPIRE-MD]].

As [[[DCAT-AP-3]]], the Application Profile specified in this document is based on the specification of the Data Catalog Vocabulary (DCAT). DCAT is originally developed under the responsibility of the Government Linked Data Working Group [[GLD]] at W3C, and was significantly revised in 2020 by the W3C Dataset Exchange Working Group [[DXWG]]. DCAT is an RDF [[RDF11-CONCEPTS]] vocabulary designed to facilitate interoperability between data catalogues published on the Web.

The objective of this work is to produce an extension of [[DCAT-AP-3]] based on numerous requests for change coming from real-world implementations of the specification listed on the GitHub issues section since the previous release [[GeoDCAT-AP-20201223]]. For that purpose the [[DCAT-AP-3]] specification is extended with improved definitions, usage notes and usage constraints such as cardinalities for properties and the usage of controlled vocabularies. Additional classes and properties are re-used or introduced where necessary.

The work does not cover implementation issues like mechanisms for exchange of data and expected behaviour of systems implementing the Application Profile other than what is defined in the Conformance Statement in section [[[#conformance]]].

The Application Profile is intended to facilitate data exchange and therefore the classes and properties defined in this document are only relevant for the data to be exchanged; there are no requirements for communicating systems to implement specific technical environments. The only requirement is that the systems can export and import data in RDF in conformance with this Application Profile.

The Application Profile is intended to facilitate data exchange and therefore the classes and properties defined in this document are only relevant for the data to be exchanged; there are no requirements for communicating systems to implement specific technical environments. The only requirement is that the systems can export and import data in RDF in conformance with this Application Profile.

As mentioned in the context, the prime objective of the Application Profile is to enhance data findability and promote reusability. To achieve this goal, datasets should be coherently documented. To enable this, the Application Profile considers several essential aspects, including among others:

These are addressed with the aim to facilitate effective data reuse, allowing users to locate, understand and utilise the available data resources more efficiently.

DCAT-AP Context

Around 2010, on behalf of the European Commission the access to public sector information was studied. These studies showed that businesses and citizens faced many difficulties in finding and reusing public sector information. The studies indicated that the availability of the information in a machine-readable format as well as a thin layer of commonly agreed metadata could facilitate data cross-reference and interoperability and therefore considerably enhance its value for reuse. Therefore, to overcome these hurdles, the European Commission invested in policies [[PSI]], data interoperability [[SEMIC]] and infrastructure [[DEU]].

Interoperable Europe, within its mission to stimulate the data interoperability in Europe, manages this specification on the metadata agreements for sharing dataset descriptions between data portals. The governance is taken care by the SEMIC action within Interoperable Europe. Initially, the scope of the specification was the exchange between Open Data Portals in Europe. Although this is still at the core of the specification, DCAT-AP is not limited to publicly accessible Open Data, but can be applied to any kind of datasets. In the past decade, DCAT-AP has grown from a single specification to a whole ecosystem of related and interconnected specifications.

Revision history

The first GeoDCAT-AP specification was released in December 2015. The subsequent release 1.0.1 improved the specification. These specifications are aligned with the core profile of ISO 19115:2003 [[ISO-19115]] and those defined in the framework of the INSPIRE Directive [[INSPIRE-DIR]]. Five years later in December 2020 the second version of GeoDCAT-AP was released. W3C DCAT 2 restructured DCAT by introducing the notions of a generic Catalogued Resource of which Datasets and Data Services are special cases. As a consequence both DCAT-AP and GeoDCAT-AP required a major revision ensuring alignment between the different specifications. In 2023, the adoption of W3C DCAT 3 [[vocab-dcat-3]] triggered a new alignment for DCAT-AP, and consequently for GeoDCAT-AP. W3C DCAT 3 extends the profile with the Dataset Series notion. This document is the combination of this alignment and addressing issues raised by the community.

Notes on alignment with DCAT 3

Being an extension of [[DCAT-AP-3]], GeoDCAT-AP inherits the changes that were introduced in [[[DCAT-AP-3]]] due to the aligment with [[[vocab-dcat-3]]]. The introduction of Dataset Series in DCAT is an additive operation from semantical, data modeling perspective. Therefore the impact on existing GeoDCAT-AP 2.x, exchanges is limited. Nevertheless, publishers may face substantial impact on the existing catalogues as the new terminology for Dataset Series may require to revisit the publisher's metadata guidelines. For instance, if the publisher had chosen to document a Dataset Series as a Dataset with multiple Distributions, then the alignment with Dataset Series as expressed in this specification will require a substantial effort. This impact goes beyond the specification and is dependent on the usage of the shared information. In the context of GeoDCAT-AP and in line with the conformance expectations and [[DCAT-AP-3]], the term Dataset Series will be solely used for resources that are explicitly identified by the class Dataset Series. The situation, as mentioned, where a Dataset has multiple Distributions, will be considered as a Dataset with multiple Distributions and not as a Dataset Series. This way, receivers of GeoDCAT-AP metadata can rely on the classes to process the metadata.

The sole data model impact DCAT 3 creates, is by deprecating the use of some URIs and introducing new URIs in the DCAT namespace for the use case of Dataset versioning. As these properties are optional and since there is an equivalence between the deprecated and the new ones, catalogue owners can easily realign.

GeoDCAT-AP 3 is the result of an alignment with DCAT 3, DCAT-AP 3 and improvements to harmonise the interoperability between DCAT-AP and GeoDCAT-AP. These changes are listed in detail in the Changelog. To support the review, the changes are also highlighted on the diagram below.

Meeting minutes

The following webinars have been held for the creation of this release

Status

This application profile has the status Candidate Recommendation published at 2024-07-09.

Information about the process and the decisions involved in the creation of this specification are consultable at the Changelog.

License

Copyright © 2024 European Union. All material in this repository is published under the license CC-BY 4.0, unless explicitly otherwise mentioned.

Conformance Statement

Provider requirements

In order to conform to this Application Profile, an application that provides metadata MUST: For the properties listed in the table in section [[[#controlled-vocs]]], the associated controlled vocabularies MUST be used. Additional controlled vocabularies MAY be used. In addition to the mandatory properties, any of the recommended and optional properties defined in section [[[#quick-reference]]] MAY be provided.

Receiver requirements

In order to conform to this Application Profile, an application that receives metadata MUST be able to:
  • Process information for all classes and properties specified in section [[[#quick-reference]]].
  • Process information for all controlled vocabularies specified in section [[[#controlled-vocs]]].
  • "Processing" means that receivers must accept incoming data and transparently provide these data to applications and services. It does neither imply nor prescribe what applications and services finally do with the data (parse, convert, store, make searchable, display to users, etc.).

    Terminology

    An Application Profile is a specification that reuses terms from one or more base standards, adding more specificity by identifying mandatory, recommended and optional elements to be used for a particular application, as well as recommendations for controlled vocabularies to be used.

    A Dataset is a collection of data, published or curated by a single source, and available for access or download in one or more formats. A Data Portal is a Web-based system that contains a data catalogue with descriptions of datasets and provides services enabling discovery and reuse of the datasets.

    Used prefixes

    PrefixNamespace IRI
    admshttp://www.w3.org/ns/adms#
    dcathttp://www.w3.org/ns/dcat#
    dcataphttp://data.europa.eu/r5r/
    dcthttp://purl.org/dc/terms/
    dctypehttp://purl.org/dc/dcmitype/
    foafhttp://xmlns.com/foaf/0.1/
    locnhttp://www.w3.org/ns/locn#
    odrlhttp://www.w3.org/ns/odrl/2/
    owlhttp://www.w3.org/2002/07/owl#
    provhttp://www.w3.org/ns/prov#
    rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
    rdfshttp://www.w3.org/2000/01/rdf-schema#
    skoshttp://www.w3.org/2004/02/skos/core#
    spdxhttp://spdx.org/rdf/terms#
    timehttp://www.w3.org/2006/time#
    vcardhttp://www.w3.org/2006/vcard/ns#
    xsdhttp://www.w3.org/2001/XMLSchema#
    orghttp://www.w3.org/ns/org#
    contenthttp://www.w3.org/2011/content#
    dqvhttp://www.w3.org/ns/dqv#
    sdmx-attributehttp://purl.org/linked-data/sdmx/2009/attribute#
    geodcataphttp://data.europa.eu/930/

    Overview

    This Application Profile extends [[DCAT-AP-3]] by including

  • additional classes and properties;
  • additional recommendations on the use of classes and properties;
  • additional controlled vocabularies (documented in 9. Controlled Vocabularies to be used, along with the ones used in [[DCAT-AP-3]]).
  • These extensions are meant to provide a DCAT-AP-conformant representation of geospatial metadata, identified by defining RDF syntax mappings covering the union of the elements in the INSPIRE metadata schema [[INSPIRE-MD-REG]], [[INSPIRE-MD]] and the core profile of [[ISO-19115]], following the criteria illustrated in A. INSPIRE and ISO 19115 Mappings.

    The current specification does not change the set of geospatial metadata elements already covered in its previous version [[GeoDCAT-AP-20201223]], but rather it updates some of the corresponding mappings based on the new classes and properties included in [[DCAT-AP-3]], following the release of version 2 of the W3C Data Catalog (DCAT) Vocabulary [[vocab-dcat-3]], and aligns them with version 2.2.0 of the INSPIRE Metadata Technical Guidelines [[INSPIRE-MD]].

    Application profile diagram

    An overview of GeoDCAT-AP is shown by the UML diagram below. The UML diagram illustrates the specification described in this document. For readability purposes, the representation has been condensed as follows: The cardinalities and qualifications are included in the figure. This specification distinguishes between main entities, i.e. classes in the core of the application profile, supporting entities, i.e. classes used for representation of less crucial aspects of the application profile, and datatypes used for typing literal values.

    This document describes the usage of the following main entities for a correct usage of the Application Profile:
    | Agent | Catalogue | Catalogue Record | Catalogued Resource | Checksum | Data Service | Dataset | Dataset Series | Distribution | Kind | Licence Document | Location | Relationship |

    The main entities are supported by:
    | Activity | Address (Core Location) | Address (vCard) | Association | Attribution | Checksum Algorithm | Concept | Concept Scheme | Datatype | Dimension | Document | Email (vCard) | Entity | Frequency | Geometry | Identifier | Legal Resource | Linguistic system | Literal | Metric | Organisation | Period of time | Policy | Provenance Statement | Quality Measurement | Resource | Rights statement | Role | Standard |

    And supported by these datatypes:
    | Media Type | Media Type or Extent | Temporal Literal | Time instant | xsd:decimal | xsd:duration | xsd:hexBinary | xsd:nonNegativeInteger |

    UML diagram overview of the GeoDCAT-AP 3.0.0 Application profile

    Main Entities

    The main entities are those that form the core of the Application Profile. The properties and their associated constraints that apply in the context of this profile are listed in a tabular form. Each row corresponds to one property. In addition to the constraints also cross-references are provided to DCAT. To save space, the following abbreviations are used to indicate in short the difference with DCAT:

    This reuse qualification assessement is w.r.t. a specific version of DCAT. Therefore it may vary over time when new versions of DCAT-AP are created.

    Agent

    Definition
    Any entity carrying out actions with respect to the entities Catalogue and the Catalogued Resources.
    Reference in DCAT-AP
    Link
    Usage Note
    If the Agent is an organisation, the use of the Organization Ontology [[ORG]] is recommended. For the purpose of this application profile, Agent from the FOAF Vocabulary [[FOAF]] is used as a unifying class, also representing Agent from Dublin Core [[DC-TERMS]] and Agent from the W3C Provenance Ontology (PROV-O) [[PROV-O]].
    Properties
    For this entity the following properties are defined: address , affiliation , email , name , phone , type , URL .
    Property Range Card Definition Usage Reuse
    address Address (Core Location) 0..1 The postal address of the Agent. P
    affiliation Organisation 0..1 The affiliation of the Agent. P
    email Resource 0..1 The email address of the Agent, specified using fully qualified mailto: URI scheme [[RFC6068]]. P
    name Literal 1..* A name of the agent. This property can be repeated for different versions of the name (e.g. the name in different languages). A
    phone Resource 0..1 The phone number of the Agent, specified using fully qualified tel: URI scheme [[RFC3966]]. P
    type Concept 0..1 The nature of the agent. A
    URL Document 0..1 The Web site of the Agent. P

    Catalogue

    Definition
    A catalogue or repository that hosts the Datasets, Data Services or Dataset Series being described.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: access rights , applicable legislation , catalogue , conforms to , contact point , creation date , creator , custodian , dataset , description , distributor , geographical coverage , has part , homepage , identifier , keyword , language , licence , modification date , originator , principal investigator , processor , publisher , qualified attribution , record , reference system , release date , resource provider , rights , rights holder , service , temporal coverage , theme , themes , title , topic category , user , was used by .
    Property Range Card Definition Usage Reuse
    access rights Rights statement 0..1 Information regarding access or restrictions based on privacy, security, or other policies. For INSPIRE metadata, this property SHOULD be used with the URIs of the "Limitations on public access" code list operated by the INSPIRE Registry [[INSPIRE-LPA]]. E
    applicable legislation Legal Resource 0..* The legislation that mandates the creation or management of the Catalog. A
    catalogue Catalogue 0..* A catalogue whose contents are of interest in the context of this catalogue. A
    conforms to Standard 0..* An established standard to which the described Catalogue conforms. A
    contact point Kind 0..* Contact information that can be used for sending comments about the Catalogue. A
    creation date Temporal Literal 0..1 The date on which the Catalogue has been first created. P
    creator Agent 0..1 An entity responsible for the creation of the Catalogue. A
    custodian Agent 0..* Party that accepts accountability and responsibility for the data and ensures appropriate care and maintenance of the resource [[ISO-19115]]. P
    dataset Dataset 0..* A Dataset that is part of the Catalogue. A
    description Literal 1..* A free-text account of the Catalogue. This property can be repeated for parallel language versions of the description. A
    distributor Agent 0..* Party who distributes the resource [[ISO-19115]]. P
    geographical coverage Location 0..* A geographical area covered by the Catalogue. This property refers to a geographic region that is covered by the Catalogue. When multiple values are used for spatial coverage, this may be interpreted as a spatial union, or as alternative representations of spatial coverage that might fit, with no explicit spatial relation. A
    has part Catalogue 0..* A related Catalogue that is part of the described Catalogue. A
    homepage Document 0..1 A web page that acts as the main page for the Catalogue. A
    identifier Literal 0..* The main identifier for the Catalogue, e.g. the URI or other unique identifier. A
    keyword Literal 0..* A keyword or tag describing the Catalogue. A
    language Linguistic system 0..* A language used in the textual metadata describing titles, descriptions, etc. of the Datasets, Data Services and Dataset Series in the Catalogue. This property can be repeated if the metadata is provided in multiple languages. A
    licence Licence Document 0..1 A licence under which the Catalogue can be used or reused. A
    modification date Temporal Literal 0..1 The most recent date on which the Catalogue was modified. A
    originator Agent 0..* Party who created the resource [[ISO-19115]]. P
    principal investigator Agent 0..* Key party responsible for gathering information and conducting research [[ISO-19115]]. P
    processor Agent 0..* Party who has processed the data in a manner such that the resource has been modified [[ISO-19115]]. P
    publisher Agent 1 An entity (organisation) responsible for making the Catalogue available. A
    qualified attribution Attribution 0..* A link to an Agent having some form of responsibility for the Catalogue. A
    record Catalogue Record 0..* A Catalogue Record that is part of the Catalogue. A
    reference system Standard 0..* The reference system used in accordance with OGC EPSG Coordinate Reference Systems Register [[OGC-EPSG]]. P
    release date Temporal Literal 0..1 The date of formal issuance (e.g., publication) of the Catalogue. A
    resource provider Agent 0..* Party that supplies the resource [[ISO-19115]]. P
    rights Rights statement 0..* A statement that specifies rights associated with the Catalogue. A
    rights holder Agent 0..* An Agent (organisation) holding rights on the Catalogued Resource. P
    service Data Service 0..* A site or end-point (Data Service) that is listed in the Catalogue. A
    temporal coverage Period of time 0..* A temporal period that the Catalogue covers. A
    theme Concept 0..* A main category of the Catalogue. A Catalogue can have multiple categories. A Catalogue may be associated with multiple Categories. A
    themes Concept Scheme 0..* A knowledge organization system used to classify the Resources that are in the Catalogue. This property refers to a knowledge organization system used to classify the Catalogue's Datasets. It must have at least the value NAL:data-theme as this is the manatory controlled vocabulary for dcat:theme. A
    title Literal 1..* A name given to the Catalogue. This property can be repeated for parallel language versions of the name. A
    topic category Concept 0..* Topic category in accordance with EN ISO 19115. The URIs of the "Topic categories in accordance with EN ISO 19115" code list operated by the INSPIRE Registry [[INSPIRE-TC]]. P
    user Agent 0..* Party who uses the resource [[ISO-19115]]. P
    was used by Activity 0..* An Activity that used the Catalogue. In GeoDCAT-AP, this property MAY be used to specify a testing Activity over a Catalogue, against a given Standard, producing as output a conformance degree. P

    Catalogue Record

    Definition
    A description of a Catalogued Resource's entry in the Catalogue.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: application profile , change type , contact point , creation date , creator , custodian , description , distributor , identifier , language , listing date , modification date , originator , primary topic , principal investigator , processor , publisher , qualified attribution , resource provider , rights holder , source metadata , title , user .
    Property Range Card Definition Usage Reuse
    application profile Standard 0..* An Application Profile that the Catalogued Resource's metadata conforms to. A
    change type Concept 0..1 The status of the catalogue record in the context of editorial flow of the dataset and data service descriptions. A
    contact point Kind 0..* Contact information that can be used for sending comments about the Catalogue Record. A
    creation date Temporal Literal 0..1 The date on which the Catalogue Record has been first created. P
    creator Agent 0..* The Agent primarily responsible for producing the Catalogue Record. P
    custodian Agent 0..* Party that accepts accountability and responsibility for the data and ensures appropriate care and maintenance of the resource [[ISO-19115]]. P
    description Literal 0..* A free-text account of the record. This property can be repeated for parallel language versions of the description. A
    distributor Agent 0..* Party who distributes the resource [[ISO-19115]]. P
    identifier Literal 0..* The main identifier for the Catalogue Record, e.g., the URI or other unique identifier in the context of the Catalogue. P
    language Linguistic system 0..* A language used in the textual metadata describing titles, descriptions, etc. of the Catalogued Resource. This property can be repeated if the metadata is provided in multiple languages. A
    listing date Temporal Literal 0..1 The date on which the description of the Resource was included in the Catalogue. A
    modification date Temporal Literal 1 The most recent date on which the Catalogue entry was changed or modified. A
    originator Agent 0..* Party who created the resource [[ISO-19115]]. P
    primary topic Catalogued Resource 1 A link to the Dataset, Data service or Catalog described in the record. A catalogue record will refer to one entity in a catalogue. This can be either a Dataset or a Data Service. To ensure an unambigous reading of the cardinality the range is set to Catalogued Resource. However it is not the intend with this range to require the explicit use of the class Catalogued Record. As abstract class, an subclass should be used. A
    principal investigator Agent 0..* Key party responsible for gathering information and conducting research [[ISO-19115]]. P
    processor Agent 0..* Party who has processed the data in a manner such that the resource has been modified [[ISO-19115]]. P
    publisher Agent 0..1 An entity (organisation) responsible for making the Data Service available. P
    qualified attribution Attribution 0..* Link to an Agent having some form of responsibility for the Catalogue Record. P
    resource provider Agent 0..* Party that supplies the resource [[ISO-19115]]. P
    rights holder Agent 0..* An Agent (organisation) holding rights on the Catalogue. P
    source metadata Catalogue Record 0..1 The original metadata that was used in creating metadata for the Dataset. This MAY refer to an INSPIRE / [[ISO-19115]] record that was transformed into the current GeoDCAT-AP one. A
    title Literal 0..* A name given to the Catalogue Record. This property can be repeated for parallel language versions of the name. A
    user Agent 0..* Party who uses the resource [[ISO-19115]]. P

    Catalogued Resource

    Definition
    Resource published or curated by a single agent.
    Reference in DCAT-AP
    Link
    Usage Note
    This class Catalogued Record is an abstract class for DCAT-AP. Therefore only subclasses should be used in a data exchange.
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Checksum

    Definition
    A value that allows the contents of a file to be authenticated.
    Reference in DCAT-AP
    Link
    Usage Note
    This class allows the results of a variety of checksum and cryptographic message digest algorithms to be represented.
    Properties
    For this entity the following properties are defined: algorithm , checksum value .
    Property Range Card Definition Usage Reuse
    algorithm Checksum Algorithm 1 The algorithm used to produce the subject Checksum. A
    checksum value xsd:hexBinary 1 A lower case hexadecimal encoded digest value produced using a specific algorithm. A

    Data Service

    Definition
    A collection of operations that provides access to one or more datasets or data processing functions.
    Reference in DCAT-AP
    Link
    Subclass of
    Catalogued Resource
    Properties
    For this entity the following properties are defined: access rights , applicable legislation , conforms to , contact point , creation date , creator , custodian , description , distributor , endpoint description , endpoint URL , format , geographical coverage , identifier , keyword , landing page , language , licence , modification date , orginator , principal investigator , processor , publisher , qualified attribution , reference system , release date , resource provider , rights , rights holder , serves dataset , service category , service protocol , service type , spatial resolution , spatial resolution as text , spatial resolution in metres , temporal coverage , temporal resolution , theme , title , topic category , type , user , was used by .
    Property Range Card Definition Usage Reuse
    access rights Rights statement 0..1 Information regarding access or restrictions based on privacy, security, or other policies. For INSPIRE metadata, this property SHOULD be used with the URIs of the "Limitations on public access" code list operated by the INSPIRE Registry [[INSPIRE-LPA]]. E
    applicable legislation Legal Resource 0..* The legislation that mandates the creation or management of the Data Service. P
    conforms to Standard 0..* An established (technical) standard to which the Data Service conforms. The standards referred here SHOULD describe the Data Service and not the data it serves. The latter is provided by the dataset with which this Data Service is connected. For instance the data service adheres to the OGC WFS API standard, while the associated dataset adheres to the INSPIRE Address data model. A
    contact point Kind 0..* Contact information that can be used for sending comments about the Data Service. A
    creation date Temporal Literal 0..1 The date on which the Data Service has been first created. P
    creator Agent 0..* An Agent primarily responsible for producing the Data Service. A
    custodian Agent 0..* Party that accepts accountability and responsibility for the data and ensures appropriate care and maintenance of the resource [[ISO-19115]]. P
    description Literal 0..* A free-text account of the Data Service. This property can be repeated for parallel language versions of the description. A
    distributor Agent 0..* Party who distributes the resource [[ISO-19115]]. P
    endpoint description Resource 0..* A description of the services available via the end-points, including their operations, parameters etc. The property gives specific details of the actual endpoint instances, while the property application profile (dct:conformsTo) is used to indicate the general standard or specification that the endpoints implement. A
    endpoint URL Resource 1..* The root location or primary endpoint of the service (an IRI). A
    format Media Type or Extent 0..* The structure that can be returned by querying the endpointURL. P
    geographical coverage Location 0..* A geographic region that is covered by the Data Service. If the Data Service provides access to multiple Datasets, then this will be the union of the spatial coverages of these Datasets. P
    identifier Literal 0..* The main identifier for the Data Service, e.g. the URI or other unique identifier in the context of the Catalogue. E
    keyword Literal 0..* A keyword or tag describing the Data Service. A
    landing page Document 0..* A web page that provides access to the Data Service and/or additional information. It is intended to point to a landing page at the original data service provider, not to a page on a site of a third party, such as an aggregator. A
    language Linguistic system 0..* The language of the structure that can be returned by querying the endpointURL. This property can be repeated if multiple languages are supported in the Data Service - see § 11. Accessibility and Multilingual Aspects. E
    licence Licence Document 0..1 A licence under which the Data service is made available. A
    modification date Temporal Literal 0..1 The most recent date on which the Data Service was changed or modified. A
    orginator Agent 0..* Party who created the resource [[ISO-19115]]. P
    principal investigator Agent 0..* Key party responsible for gathering information and conducting research [[ISO-19115]]. P
    processor Agent 0..* Party who has processed the data in a manner such that the resource has been modified [[ISO-19115]]. P
    publisher Agent 0..1 An entity (organisation) responsible for making the Data Service available. A
    qualified attribution Attribution 0..* Link to an Agent having some form of responsibility for the Data Service. A
    reference system Concept 0..* The reference system used in the Data Service. Spatial reference systems SHOULD be specified by using the corresponding URIs from the "EPSG coordinate reference systems" register operated by OGC [[OGC-EPSG]]. P
    release date Temporal Literal 0..1 The date of formal issuance (e.g., publication) of the Data Service. A
    resource provider Agent 0..* Party that supplies the resource [[ISO-19115]]. P
    rights Rights statement 0..* A statement that specifies rights associated with the Data Service. A
    rights holder Agent 0..* An Agent (organisation) holding rights on the Catalogue. P
    serves dataset Dataset 0..* This property refers to a collection of data that this data service can distribute. A
    service category Concept 0..1 Service category in accordance with INSPIRE Spatial Data Service Categories [[INSPIRE-SDSC]]. The URIs of the "Classification of spatial data services" code list operated by the INSPIRE Registry [[INSPIRE-SDSC]]. P
    service protocol Concept 0..1 Protocol value in accordance with INSPIRE Protocol Values [[INSPIRE-PV]]. P
    service type Concept 0..1 Service type in accordance with INSPIRE Spatial Data Service Types [[INSPIRE-SDST]]. One of the URIs of the "Spatial Data Service Types" code list operated by the INSPIRE Registry [[INSPIRE-SDST]]. P
    spatial resolution Quality Measurement 0..* Spatial resolution, as defined in [[INSPIRE-MD-REG]], [[ISO-19115]], and [[ISO-19115-1]]. Represents the capabilities of the data service, i.e. in which spatial resolutions it can serve the data. P
    spatial resolution as text Literal 0..* Textual description of spatial resolution. Spatial resolution as free-text, when it cannot be specified via dqv:hasQualityMeasurement and dcat:spatialResolutionInMeters. Represents the capabilities of the data service, i.e. in which spatial resolutions it can serve the data. P
    spatial resolution in metres xsd:decimal 0..* The minimum spatial separation resolvable in a Data Service, measured in metres. Represents the capabilities of the data service, i.e. in which spatial resolutions it can serve the data. P
    temporal coverage Period of time 0..* A temporal period that the Data Service covers. P
    temporal resolution xsd:duration 0..* The minimum time period resolvable in the Data Service. E
    theme Concept 0..* A category of the Data Service. A Data Service may be associated with multiple themes. A
    title Literal 1..* A name given to the Data Service. This property can be repeated for parallel language versions of the name. A
    topic category Concept 0..* Topic category in accordance with ISO-19115 [[INSPIRE-TC]]. One of the URIs of the "Topic categories in accordance with EN ISO 19115" code list operated by the INSPIRE Registry [[INSPIRE-TC]]. P
    type Concept 0..1 Resource type in accordance with INSPIRE Resource Types [[INSPIRE-RT]]. URIs of the "Resource types" code list operated by the INSPIRE Registry [[INSPIRE-RT]] - namely the one corresponding to "Spatial data service". P
    user Agent 0..* Party who uses the resource [[ISO-19115]]. P
    was used by Activity 0..* To an Activity that used the Data Service. In GeoDCAT-AP, this property MAY be used to specify a testing Activity over a Data Service, against a given Standard, producing as output a conformance degree. P

    Dataset

    Definition
    A conceptual entity that represents the information published.
    Reference in DCAT-AP
    Link
    Usage Note
    If a Dataset is used as part of a Dataset Series, the properties listed below can be used additionally, or slightly differently to those listed for the Dataset outside of a Dataset Series. For this usage, consult the usage guidelines of DCAT-AP.
    Subclass of
    Catalogued Resource
    Properties
    For this entity the following properties are defined: access rights , applicable legislation , conforms to , contact point , creation date , creator , custodian , dataset distribution , description , distributor , documentation , frequency , geographical coverage , has version , identifier , in series , is referenced by , keyword , landing page , language , modification date , originator , other identifier , principal investigator , processor , provenance , publisher , qualified attribution , qualified relation , reference system , related resource , release date , resource provider , resource type , rights , rights holder , sample , source , spatial resolution , spatial resolution as text , spatial resolution in metres , temporal coverage , temporal resolution , theme , title , topic category , user , version , version notes , was generated by , was used by .
    Property Range Card Definition Usage Reuse
    access rights Rights statement 0..1 Information that indicates whether the Dataset is publicly accessible, has access restrictions or is not public. For INSPIRE metadata, this property SHOULD be used with the URIs of the "Limitations on public access" code list operated by the INSPIRE Registry [[INSPIRE-LPA]]. E
    applicable legislation Legal Resource 0..* The legislation that mandates the creation or management of the Dataset. A
    conforms to Standard 0..* An implementing rule or other specification. A
    contact point Kind 0..* Contact information that can be used for sending comments about the Dataset. A
    creation date Temporal Literal 0..1 The date on which the Dataset has been first created. P
    creator Agent 0..* The Agent primarily responsible for producing the Dataset. A
    custodian Agent 0..* Party that accepts accountability and responsibility for the data and ensures appropriate care and maintenance of the resource [[ISO-19115]]. P
    dataset distribution Distribution 0..* An available Distribution for the Dataset. A
    description Literal 1..* A free-text account of the Dataset. This property can be repeated for parallel language versions of the description. A
    distributor Agent 0..* Party who distributes the resource [[ISO-19115]]. P
    documentation Document 0..* A page or document about this Dataset. A
    frequency Frequency 0..1 The frequency at which the Dataset is updated. A
    geographical coverage Location 0..* A geographic region that is covered by the Dataset. This property refers to a geographic region that is covered by the Dataset. When multiple values are used for spatial coverage, this may be interpreted as a spatial union, or as alternative representations of spatial coverage that might fit, with no explicit spatial relation. A
    has version Dataset 0..* A related Dataset that is a version, edition, or adaptation of the described Dataset. A
    identifier Literal 0..* The main identifier for the Dataset, e.g. the URI or other unique identifier in the context of the Catalogue. A
    in series Dataset Series 0..* A dataset series of which the dataset is part. A
    is referenced by Resource 0..* A related resource, such as a publication, that references, cites, or otherwise points to the Dataset. A
    keyword Literal 0..* A keyword or tag describing the Dataset. A
    landing page Document 0..* A web page that provides access to the Dataset, its Distributions and/or additional information. It is intended to point to a landing page at the original data provider, not to a page on a site of a third party, such as an aggregator. A
    language Linguistic system 0..* A language of the Dataset. This property can be repeated if there are multiple languages in the Dataset. A
    modification date Temporal Literal 0..1 The most recent date on which the Dataset was changed or modified. A
    originator Agent 0..* Party who created the resource [[ISO-19115]]. P
    other identifier Identifier 0..* A secondary identifier of the Dataset Examples are MAST/ADS [[MASTADS]], DOI [[DOI]], EZID [[EZID]] or W3ID [[W3ID]]. A
    principal investigator Agent 0..* Key party responsible for gathering information and conducting research [[ISO-19115]]. P
    processor Agent 0..* Party who has processed the data in a manner such that the resource has been modified [[ISO-19115]]. P
    provenance Provenance Statement 0..* A statement about the lineage of a Dataset. A
    publisher Agent 0..1 An entity (organisation) responsible for making the Dataset available. A
    qualified attribution Attribution 0..* An Agent having some form of responsibility for the resource. A
    qualified relation Relationship 0..* A description of a relationship with another resource. A
    reference system Concept 0..* The reference system used in accordance with OGC EPSG Coordinate Reference Systems Register [[OGC-EPSG]]. P
    related resource Resource 0..* A related resource. A
    release date Temporal Literal 0..1 The date of formal issuance (e.g., publication) of the Dataset. A
    resource provider Agent 0..* Party that supplies the resource [[ISO-19115]]. P
    resource type Concept 0..1 Resource type in accordance with INSPIRE Resource Types [[INSPIRE-RT]]. E
    rights Rights statement 0..* A statement that specifies rights associated with the Dataset. A
    rights holder Agent 0..* An Agent (organisation) holding rights on the Dataset. P
    sample Distribution 0..* A sample distribution of the dataset. A
    source Dataset 0..* A related Dataset from which the described Dataset is derived. A
    spatial resolution Quality Measurement 0..* The performed quality measurements. In GeoDCAT-AP, this property is used to specify "spatial resolution", as defined in [[INSPIRE-MD-REG]], [[ISO-19115]], and [[ISO-19115-1]]. Describes the spatial resolution of the original data in the dataset, i.e. regardless of how it is distributed using distributions. E
    spatial resolution as text Literal 0..* Textual description of spatial resolution. Spatial resolution as free-text, when it cannot be specified via dqv:hasQualityMeasurement and dcat:spatialResolutionInMeters. Describes the spatial resolution of the original data in the dataset, i.e. regardless of how it is distributed using distributions. P
    spatial resolution in metres xsd:decimal 0..* The minimum spatial separation resolvable in a Dataset, measured in meters. Describes the spatial resolution of the original data in the dataset, i.e. regardless of how it is distributed using distributions. A
    temporal coverage Period of time 0..* A temporal period that the Dataset covers. A
    temporal resolution xsd:duration 0..* The minimum time period resolvable in the Dataset. A
    theme Concept 0..* A category of the Dataset. A Dataset may be associated with multiple themes. A
    title Literal 1..* A name given to the Dataset. This property can be repeated for parallel language versions of the name. A
    topic category Concept 0..* Topic category in accordance with ISO-19115 [[INSPIRE-TC]]. P
    user Agent 0..* Party who uses the resource [[ISO-19115]]. P
    version Literal 0..* The version indicator (name or identifier) of a resource. A
    version notes Literal 0..* A description of the differences between this version and a previous version of the Dataset. This property can be repeated for parallel language versions of the version notes. A
    was generated by Activity 0..* An activity that generated, or provides the business context for, the creation of the Dataset. A
    was used by Activity 0..* An Activity that used the Dataset. In GeoDCAT-AP, this property MAY be used to specify a testing Activity over a Dataset, against a given Standard, producing as output a conformance degree. P

    Dataset Series

    Definition
    A collection of datasets that are published separately,but share some characteristics that group them.
    Reference in DCAT-AP
    Link
    Usage Note
    It is recommended to avoid Dataset Series without a dataset in the collection. Therefore at least one Dataset should refer to a Dataset Series using the property in series (dcat:inSeries).
    Subclass of
    Dataset
    Properties
    For this entity the following properties are defined: access rights , applicable legislation , conforms to , contact point , creation date , creator , custodian , dataset series distribution , description , distributor , documentation , frequency , geographical coverage , has version , identifier , in series , is referenced by , keyword , landing page , language , modification date , originator , other identifier , principal investigator , processor , publisher , qualified attribution , qualified relation , reference system , related resource , release date , resource provider , resource type , rights , rights holder , sample , source , spatial resolution , spatial resolution as text , spatial resolution in metres , temporal coverage , theme , title , topic category , user , version , version notes , was generated by , was used by .
    Property Range Card Definition Usage Reuse
    access rights Rights statement 0..1 Information that indicates whether the Dataset Series is publicly accessible, has access restrictions or is not public. For INSPIRE metadata, this property SHOULD be used with the URIs of the "Limitations on public access" code list operated by the INSPIRE Registry [[INSPIRE-LPA]]. E
    applicable legislation Legal Resource 0..* The legislation that mandates the creation or management of the Dataset Series. A
    conforms to Standard 0..* An implementing rule or other specification. E
    contact point Kind 0..* Contact information that can be used for sending comments about the Dataset Series. A
    creation date Temporal Literal 0..1 The date on which the Dataset Series has been first created. P
    creator Agent 0..* An entity responsible for producing the Dataset Series. E
    custodian Agent 0..* Party that accepts accountability and responsibility for the data and ensures appropriate care and maintenance of the resource [[ISO-19115]]. P
    dataset series distribution Distribution 0..* An available Distribution for the Dataset Series. E
    description Literal 1..* A free-text account of the Dataset Series. This property can be repeated for parallel language versions. It is recommended to provide an indication about the dimensions the Dataset Series evolves. A
    distributor Agent 0..* Party who distributes the resource [[ISO-19115]]. P
    documentation Document 0..* A page or document about this Dataset Series. E
    frequency Frequency 0..1 The frequency at which the Dataset Series is updated. The frequency of a dataset series is not equal to the frequency of the dataset in the collection. A
    geographical coverage Location 0..* A geographic region that is covered by the Dataset Series. When spatial coverage is a dimension in the dataset series then the spatial coverage of each dataset in the collection should be part of the spatial coverage. In that case, an open ended value is recommended, e.g. EU or a broad bounding box covering the expected values. A
    has version Dataset 0..* A related Dataset that is a version, edition, or adaptation of the described Dataset Series. E
    identifier Literal 0..* The main identifier for the Dataset Series, e.g. the URI or other unique identifier in the context of the Catalogue. E
    in series Dataset Series 0..* A dataset series of which the dataset series is part. E
    is referenced by Resource 0..* A related resource, such as a publication, that references, cites, or otherwise points to the Dataset Series. E
    keyword Literal 0..* A keyword or tag describing the Dataset. E
    landing page Document 0..* A web page that provides access to the Dataset Series, its Distributions and/or additional information. E
    language Linguistic system 0..* A language of the Dataset Series. E
    modification date Temporal Literal 0..1 The most recent date on which the Dataset Series was changed or modified. This is not equal to the most recent modified dataset in the collection of the dataset series. A
    originator Agent 0..* Party who created the resource [[ISO-19115]]. P
    other identifier Identifier 0..* A secondary identifier of the Dataset Series. Examples are MAST/ADS [[MASTADS]], DOI [[DOI]], EZID [[EZID]] or W3ID [[W3ID]]. E
    principal investigator Agent 0..* Key party responsible for gathering information and conducting research [[ISO-19115]]. P
    processor Agent 0..* Party who has processed the data in a manner such that the resource has been modified [[ISO-19115]]. P
    publisher Agent 0..1 An entity (organisation) responsible for ensuring the coherency of the Dataset Series  The publisher of the dataset series may not be the publisher of all datasets.  E.g. a digital archive could take over the publishing of older datasets in the series.  A
    qualified attribution Attribution 0..* An Agent having some form of responsibility for the resource. E
    qualified relation Relationship 0..* A description of a relationship with another resource. E
    reference system Concept 0..* The reference system used in accordance with OGC EPSG Coordinate Reference Systems Register [[OGC-EPSG]]. Spatial reference systems SHOULD be specified by using the corresponding URIs from the "EPSG coordinate reference systems" register operated by OGC [[OGC-EPSG]]. P
    related resource Catalogued Resource 0..* A related resource. E
    release date Temporal Literal 0..1 The date of formal issuance (e.g., publication) of the Dataset Series. The moment when the dataset series was established as a managed resource. This is not equal to the release date of the oldest dataset in the collection of the dataset series. A
    resource provider Agent 0..* Party that supplies the resource [[ISO-19115]]. P
    resource type Concept 0..1 Resource type in accordance with INSPIRE Resource Types [[INSPIRE-RT]]. P
    rights Rights statement 0..* A statement that specifies rights associated with the Dataset Series. A
    rights holder Agent 0..* An Agent (organisation) holding rights on the Dataset Series. P
    sample Distribution 0..* A sample distribution of the Dataset Series. E
    source Dataset 0..* A related Dataset from which the described Dataset Series is derived. E
    spatial resolution Quality Measurement 0..* The performed quality measurements. In GeoDCAT-AP, this property is used to specify "spatial resolution", as defined in [[INSPIRE-MD-REG]], [[ISO-19115]], and [[ISO-19115-1]]. E
    spatial resolution as text Literal 0..* Textual description of spatial resolution. Spatial resolution as free-text, when it cannot be specified via dqv:hasQualityMeasurement and dcat:spatialResolutionInMeters. P
    spatial resolution in metres xsd:decimal 0..* The minimum spatial separation resolvable in a Dataset, measured in meters. A
    temporal coverage Period of time 0..* A temporal period that the Dataset Series covers. When temporal coverage is a dimension in the dataset series then the temporal coverage of each dataset in the collection should be part of the temporal coverage. In that case, an open ended value is recommended, e.g. after 2012. A
    theme Concept 0..* A category of the Dataset Series. E
    title Literal 1..* A name given to the Dataset Series. This property can be repeated for parallel language versions of the name. A
    topic category Concept 0..* Topic category in accordance with ISO-19115 [[INSPIRE-TC]]. P
    user Agent 0..* Party who uses the resource [[ISO-19115]]. P
    version Literal 0..* The version indicator (name or identifier) of a resource. E
    version notes Literal 0..* A description of the differences between this version and a previous version of the Dataset. This property can be repeated for parallel language versions of the version notes. E
    was generated by Activity 0..* An activity that generated, or provides the business context for, the creation of the Dataset Series. E
    was used by Activity 0..* An Activity that used the Dataset Series. In GeoDCAT-AP, this property MAY be used to specify a testing Activity over a Dataset Series, against a given Standard, producing as output a conformance degree. P

    Distribution

    Definition
    A physical embodiment of the Dataset in a particular format.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: access rights , access service , access URL , applicable legislation , availability , byte size , character encoding , checksum , compression format , description , documentation , download URL , format , has policy , language , licence , linked schemas , media type , modification date , packaging format , reference system , release date , representation technique , rights , spatial resolution , spatial resolution as text , spatial resolution in metres , status , temporal resolution , title .
    Property Range Card Definition Usage Reuse
    access rights Rights statement 0..1 Information regarding access or restrictions based on privacy, security, or other policies. For INSPIRE metadata, this property SHOULD be used with the URIs of the "Limitations on public access" code list operated by the INSPIRE Registry [[INSPIRE-LPA]]. P
    access service Data Service 0..* A data service that gives access to the distribution of the dataset. A
    access URL Resource 1..* A URL that gives access to a Distribution of the Dataset or Dataset Series. The resource at the access URL may contain information about how to get the Dataset or Dataset Series. A
    applicable legislation Legal Resource 0..* The legislation that mandates the creation or management of the Distribution. A
    availability Concept 0..1 An indication how long it is planned to keep the Distribution of the Dataset available. A
    byte size xsd:nonNegativeInteger 0..1 The size of a Distribution in bytes. A
    character encoding Literal 0..* A character encoding used in the downloadable file or output of the data service represented by the Distribution. It SHOULD be expressed using a character set name defined in the IANA register [[IANA-CHARSETS]]. P
    checksum Checksum 0..1 A mechanism that can be used to verify that the contents of a distribution have not changed. The checksum is related to the downloadURL. A
    compression format Media Type 0..1 The format of the file in which the data is contained in a compressed form, e.g. to reduce the size of the downloadable file. It SHOULD be expressed using a media type as defined in the official register of media types managed by IANA [[IANA-MEDIA-TYPES]]. A
    description Literal 0..* A free-text account of the Distribution. This property can be repeated for parallel language versions of the description. A
    documentation Document 0..* A page or document about this Distribution. A
    download URL Resource 0..* A URL that is a direct link to a downloadable file in a given format. A
    format Media Type or Extent 0..1 The file format of the Distribution. A
    has policy Policy 0..1 The policy expressing the rights associated with the Distribution if using the [[ODRL]] vocabulary. A
    language Linguistic system 0..* A language used in the Distribution. This property can be repeated if the metadata is provided in multiple languages. A
    licence Licence Document 0..1 A licence under which the Distribution is made available. A
    linked schemas Standard 0..* An established schema to which the described Distribution conforms. A
    media type Media Type 0..1 The media type of the Distribution as defined in the official register of media types managed by IANA. It SHOULD be expressed using a media type as defined in the official register of media types managed by IANA [[IANA-MEDIA-TYPES]]. A
    modification date Temporal Literal 0..1 The most recent date on which the Distribution was changed or modified. A
    packaging format Media Type 0..1 The format of the file in which one or more data files are grouped together, e.g. to enable a set of related files to be downloaded together. It SHOULD be expressed using a media type as defined in the official register of media types managed by IANA [[IANA-MEDIA-TYPES]]. A
    reference system Standard 0..* The reference system used in the Distribution. The reference system used in accordance with OGC EPSG Coordinate Reference Systems Register [[OGC-EPSG]]. P
    release date Temporal Literal 0..1 The date of formal issuance (e.g., publication) of the Distribution. A
    representation technique Concept 0..1 Information about the format in which an Distribution is released. This is different from the file format as, for example, a ZIP file (file format) could contain an XML schema (representation technique). In GeoDCAT-AP, this property SHOULD be used to express the spatial representation type (grid, vector, tin), by using the URIs of the corresponding code list operated by the INSPIRE Registry [[INSPIRE-SRT]]. P
    rights Rights statement 0..* A statement that specifies rights associated with the Distribution. A
    spatial resolution Quality Measurement 0..1 Refers to the performed quality measurements. In GeoDCAT-AP, this property is used to specify "spatial resolution", as defined in [[INSPIRE-MD-REG]], [[ISO-19115]], and [[ISO-19115-1]]. E
    spatial resolution as text Literal 0..1 Textual description of spatial resolution of a Distribution. Spatial resolution types that cannot be specified via dcat:spatialResolutionInMeters - i.e., spatial resolution as equivalent scale, angular distance, vertical distance. P
    spatial resolution in metres xsd:decimal 0..1 The minimum spatial separation resolvable in a dataset distribution, measured in meters. A
    status Concept 0..1 The status of the Distribution in the context of maturity lifecycle. It MUST take one of the values Completed, Deprecated, Under Development, Withdrawn. A
    temporal resolution xsd:duration 0..* The minimum time period resolvable in the dataset distribution. A
    title Literal 0..* A name given to the Distribution. This property can be repeated for parallel language versions of the description. A

    Kind

    Definition
    A description following the vCard specification,e.g. to provide telephone number and e-mail address for a contact point.
    Reference in DCAT-AP
    Link
    Usage Note
    Note that the class Kind is the parent class for the four explicit types of vCard (Individual, Organization, Location, Group).
    Properties
    For this entity the following properties are defined: address , affiliation , email , name , phone , URL .
    Property Range Card Definition Usage Reuse
    address Address (vCard) 0..1 The postal address of the Kind. P
    affiliation Literal 0..1 The affiliation of the Kind. His property can be repeated for different versions of the name (e.g. the name in different languages) - see § 11. Accessibility and Multilingual Aspects. P
    email Email (vCard) 0..1 An email address of the Kind. It MUST be specified using fully qualified mailto: URI scheme [[RFC6068]]. P
    name Literal 0..1 A name of the Kind. This property can be repeated for different versions of the name (e.g., the name in different languages P
    phone Resource 0..1 The phone number of the Kind. It MUST be specified using fully qualified tel: URI scheme [[RFC3966]]. P
    URL Resource 0..1 A Web site of the Kind. P

    Licence Document

    Definition
    A legal document giving official permission to do something with a resource.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: type .
    Property Range Card Definition Usage Reuse
    type Concept 0..* A type of licence, e.g. indicating 'public domain' or 'royalties required'. P

    Location

    Definition
    A spatial region or named place.
    Reference in DCAT-AP
    Link
    Usage Note
    It can be represented using a controlled vocabulary or with geographic coordinates. In the latter case, the use of the Core Location Vocabulary is recommended, following the approach described in the GeoDCAT-AP specification.
    Properties
    For this entity the following properties are defined: bbox , centroid , gazetteer , geograhic identifier , geograhic name , geometry .
    Property Range Card Definition Usage Reuse
    bbox Literal 0..1 The geographic bounding box of a resource. A
    centroid Literal 0..1 The geographic center (centroid) of a resource. A
    gazetteer Concept Scheme 0..1 The gazetteer to which the Location belongs. P
    geograhic identifier Literal 0..* The geographic identifier for the Location, e.g., the URI or other unique identifier in the context of the relevant gazetteer. P
    geograhic name Literal 0..* A preferred label of the Location. This property can be repeated for parallel language versions of the label - see § 11. Accessibility and Multilingual Aspects. P
    geometry Geometry 0..1 The corresponding geometry for a resource. A

    Relationship

    Definition
    An association class for attaching additional information to a relationship between DCAT Resources.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: had role , relation .
    Property Range Card Definition Usage Reuse
    had role Role 1..* A function of an entity or agent with respect to another entity or resource. A
    relation Resource 1..* A resource related to the source resource. A

    Supportive Entities

    The supportive entities are supporting the main entities in the Application Profile. They are included in the Application Profile because they form the range of properties.

    Activity

    Definition
    An activity is something that occurs over a period of time and acts upon or with entities; it may include consuming, processing, transforming, modifying, relocating, using, or generating entities.
    Reference in DCAT-AP
    Link
    Usage Note
    In GeoDCAT-AP, this class SHOULD be used to specify a testing activity over a resource, against a given Standard, producing as output a conformance
    Properties
    For this entity the following properties are defined: generated , qualified association , used .
    Property Range Card Definition Usage Reuse
    generated Entity 0..* The Entity generated by the Activity. P
    qualified association Association 0..* Association to the Plan according to which the Activity has been carried out, and possibly to the Agent who played a role in it. P
    used Entity 0..* The entity (e.g., a Catalogue, a Dataset, a Data Service) which was the subject of the Activity. This property MAY be omitted in case its inverse property prov:wasUsedBy is specified. P
    shows the use of class prov:Activity to specify the results of a testing activity assessing the conformance of a given resource against a given specification - as illustrated in .

    Address (Core Location)

    Definition
    A spatial object that in a human-readable way identifies a fixed location.
    Usage Note
    See Address in the Core Location Vocabulary [[LOCN]].
    Properties
    For this entity the following properties are defined: administrative area , city , country , post code , street address .
    Property Range Card Definition Usage Reuse
    administrative area Literal 0..1 The name of a secondary level/region of the address, usually a county, state or other such area that typically encompasses several localities. P
    city Literal 0..1 A name created and maintained for postal purposes to identify a subdivision of addresses and postal delivery points. P
    country Literal 0..1 The name of a secondary level/region of the address, usually a county, state or other such area that typically encompasses several localities. P
    post code Literal 0..1 The code created and maintained for postal purposes to identify a subdivision of addresses and postal delivery points. P
    street address Literal 0..1 The name of a passage or way through from one location to another. P

    Address (vCard)

    Definition
    A postal address.
    Usage Note
    See Address in vCard Ontology [[VCARD]].
    Properties
    For this entity the following properties are defined: administrative area , city , country , postal code , street address .
    Property Range Card Definition Usage Reuse
    administrative area Literal 0..1 The administrative area of an Address. Depending on the country, this corresponds to a province, a county, a region, or a state. P
    city Literal 0..1 The city of an Address. P
    country Literal 0..1 The country of an Address. P
    postal code Literal 0..1 The postal code of an Address. P
    street address Literal 0..1 The street name and civic number of an Address. P

    Association

    Definition
    An activity association is an assignment of responsibility to an agent for an activity, indicating that the agent had a role in the activity. It further allows for a plan to be specified, which is the plan intended by the agent to achieve some goals in the context of this activity.
    Usage Note
    See Association in PROV-O [[PROV]].
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Attribution

    Definition
    Attribution is the ascribing of an entity to an agent. When an entity e is attributed to agent ag, entity e was generated by some unspecified activity that in turn was associated to agent ag. Thus, this relation is useful when the activity is not known, or irrelevant.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: agent , had role .
    Property Range Card Definition Usage Reuse
    agent Agent 0..* The Agent to whom the resource is attributed. P
    had role Role 0..* A function of an entity or agent with respect to another entity or resource. In GeoDCAT-AP, this property SHOULD take as value one of the URIs of the "Responsible party roles" code list operated by the INSPIRE Registry [[INSPIRE-RPR]]. P

    Checksum Algorithm

    Definition
    Algorithm for Checksums.
    Reference in DCAT-AP
    Link
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Concept

    Definition
    A SKOS concept can be viewed as an idea or notion; a unit of thought. However, what constitutes a unit of thought is subjective, and this definition is meant to be suggestive, rather than restrictive.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: category scheme , preferred label .
    Property Range Card Definition Usage Reuse
    category scheme Concept Scheme 0..1 Relates a resource (for example a concept) to a concept scheme in which it is included. P
    preferred label Literal 1..* A preferred label of the concept. This property can be repeated for parallel language versions of the label. P

    Concept Scheme

    Definition
    A SKOS concept scheme can be viewed as an aggregation of one or more SKOS concepts. Semantic relationships (links) between those concepts may also be viewed as part of a concept scheme.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: title .
    Property Range Card Definition Usage Reuse
    title Literal 1..* A name of the concept scheme. May be repeated for different versions of the name P

    Datatype

    Definition
    The class of datatypes.
    Usage Note
    See rdfs:Datatype.
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Dimension

    Definition
    Represents criteria relevant for assessing quality. Each quality dimension must have one or more metric to measure it.
    Usage Note
    See Dimension in Data on the Web Best Practices: Data Quality Vocabulary [[VOCAB-DQV]].
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Document

    Definition
    A textual resource intended for human consumption that contains information,e.g. a web page about a Dataset.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: description , title .
    Property Range Card Definition Usage Reuse
    description Literal 0..* A free-text account of the Document. P
    title Literal 0..* A name of the document. P

    Email (vCard)

    Definition
    To specify the electronic mail address for communication with the object
    Usage Note
    See Email in VCard Ontology [[VCARD]].
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Entity

    Definition
    An entity is a physical, digital, conceptual, or other kind of thing with some fixed aspects; entities may be real or imaginary.
    Usage Note
    See Entity in PROV-O [[PROV]].
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Frequency

    Definition
    A rate at which something recurs, e.g. the publication of a Dataset.
    Reference in DCAT-AP
    Link
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Geometry

    Definition
    The locn:Geometry class provides the means to identify a location as a point, line, polygon, etc. expressed using coordinates in some coordinate reference system.
    Reference in DCAT-AP
    Link
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Identifier

    Definition
    This is based on the UN/CEFACT Identifier class.
    Reference in DCAT-AP
    Link
    Usage Note
    An identifier in a particular context, consisting of the
    • content string that is the identifier;
    • an optional identifier for the identifier scheme;
    • an optional identifier for the version of the identifier scheme;
    • an optional identifier for the agency that manages the identifier scheme.
    Properties
    For this entity the following properties are defined: notation .
    Property Range Card Definition Usage Reuse
    notation Literal 1 A string that is an identifier in the context of the identifier scheme referenced by its datatype. A

    Legal Resource

    Definition
    This class represents the legislation, policy or policies that lie behind the Rules that govern the service.
    Reference in DCAT-AP
    Link
    Usage Note
    The definition and properties of the Legal Resource class are aligned with the ontology included in "Council conclusions inviting the introduction of the European Legislation Identifier (ELI)". For describing the attributes of a Legal Resource (labels, preferred labels, alternative labels, definition, etc.) we refer to the (ELI) ontology. In this data specification the use is restricted to instances of this class that follow the (ELI) URI guidelines.
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Linguistic system

    Definition
    A system of signs, symbols, sounds, gestures, or rules used in communication, e.g. a language.
    Reference in DCAT-AP
    Link
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Literal

    Definition
    A literal value such as a string or integer; Literals may be typed, e.g. as a date according to xsd:date. Literals that contain human-readable text have an optional language tag as defined by BCP 47 [[RFC5646]].
    Reference in DCAT-AP
    Link
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Metric

    Definition
    Represents a standard to measure a quality dimension. An observation (instance of dqv:QualityMeasurement) assigns a value in a given unit to a Metric.
    Usage Note
    In GeoDCAT-AP, this class is used to define individuals corresponding to the different types of spatial resolution. See Metric in Data on the Web Best Practices: Data Quality Vocabulary [[VOCAB-DQV]].
    Properties
    For this entity the following properties are defined: dimension , expected data type .
    Property Range Card Definition Usage Reuse
    dimension Dimension 0..1 The dimensions a quality metric, certificate and annotation allow a measurement of. In GeoDCAT-AP, this property is used in the definition of the instances of dqv:Metric corresponding to the different types of spatial resolution (see Instances of Metric). When used for this purpose, it MUST always take as value dqv:precision. P
    expected data type Datatype 0..1 Represents the expected data type for the metric's observed value (e.g., xsd:boolean, xsd:double etc...) P

    Organisation

    Definition
    Represents a collection of people organized together into a community or other social, commercial or political structure. The group has some common purpose or reason for existence which goes beyond the set of people belonging to it and can act as an Agent. Organizations are often decomposable into hierarchical structures.
    Usage Note
    See Organization in The Organization Ontology [[ORG]].
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Period of time

    Definition
    An interval of time that is named or defined by its start and end dates.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: beginning , end , end date , start date .
    Property Range Card Definition Usage Reuse
    beginning Time instant 0..1 The beginning of a period or interval. A
    end Time instant 0..1 The end of a period or interval. A
    end date Temporal Literal 0..1 The end of the period. A
    start date Temporal Literal 0..1 The start of the period. A
    is equivalent to , but it uses the [[OWL-TIME]] properties.

    Policy

    Definition
    A non-empty group of Permissions and/or Prohibitions.
    Reference in DCAT-AP
    Link
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Provenance Statement

    Definition
    A statement of any changes in ownership and custody of a resource since its creation that are significant for its authenticity, integrity, and interpretation.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: provenance statement text .
    Property Range Card Definition Usage Reuse
    provenance statement text Literal 0..* The text of the Provenance Statement This property can be repeated for parallel language versions of the text. P

    Quality Measurement

    Definition
    Represents the evaluation of a given resource (as a Data Service, Dataset, or Distribution) against a specific quality metric.
    Usage Note
    See Quality Measurement in Data on the Web Best Practices: Data Quality Vocabulary [[VOCAB-DQV]].
    Properties
    For this entity the following properties are defined: is measurement of , unit of measure , value .
    Property Range Card Definition Usage Reuse
    is measurement of Metric 0..1 The Metric being observed. In GeoDCAT-AP, this property is used to specify the type of spatial resolution being described, by taking as object one of the instances of dqv:Metric documented in Instances of Metric. P
    unit of measure Concept 0..1 The unit in which the data values are measured. In GeoDCAT-AP, this property is used to specify, when relevant, the unit of measure of the spatial resolution being described, by taking as object the relevant term from the QUDT Units Vocabulary [[QUDT-UNITS]]. P
    value Literal 0..1 Value computed by the relevant Metric. In GeoDCAT-AP, this property is used to specify the value of the spatial resolution being described via a typed literal. The datatype MUST correspond to the one specified via property dqv:expectedDataType in the definition of the corresponding instance of dqv:Metric. P

    Resource

    Definition
    Anything described by RDF.
    Reference in DCAT-AP
    Link
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Rights statement

    Definition
    A statement about the intellectual property rights (IPR) held in or over a resource, a legal document giving official permission to do something with a resource, or a statement about access rights.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: rights statement text .
    Property Range Card Definition Usage Reuse
    rights statement text Literal 0..* The text of the Rights Statement. This property can be repeated for parallel language versions of the text. P

    Role

    Definition
    A role is the function of a resource or agent with respect to another resource, in the context of resource attribution or resource relationships.
    Reference in DCAT-AP
    Link
    Usage Note
    Note it is a subclass of skos:Concept.
    Properties
    This specification does not impose any additional requirements to properties for this entity.

    Standard

    Definition
    A standard or other specification to which a Dataset or Distribution conforms.
    Reference in DCAT-AP
    Link
    Properties
    For this entity the following properties are defined: creation date , description , identifier , reference register , release date , title , type , update / modification date , version .
    Property Range Card Definition Usage Reuse
    creation date Temporal Literal 0..1 The date on which the Standard has been first created. P
    description Literal 0..* A free-text account of the Standard. This property can be repeated for parallel language versions of the description. P
    identifier Literal 0..* The main identifier for the Standard, e.g. the URI or other unique identifier in the context of the Catalogue, or of a reference register (e.g., the ISO, OGC, W3C catalogues of their standards, the OGC "EPSG coordinate reference systems" register [[OGC-EPSG]]). P
    reference register Concept Scheme 0..1 The reference register to which the Standard belongs. P
    release date Temporal Literal 0..1 The date of formal issuance (e.g., publication) of the Standard. P
    title Literal 0..* Name given to the Standard. This property can be repeated for parallel language versions of the name. P
    type Concept 0..1 The type of the Standard. In GeoDCAT-AP, when the Standard is a spatial or temporal reference system, the relevant URIs from the INSPIRE glossary SHOULD be used [[INSPIRE-GLOSSARY]]. P
    update / modification date Temporal Literal 0..1 The most recent date on which the Standard was changed or modified. P
    version Literal 0..1 A version number or other version designation of the Standard. P

    Datatypes

    The following datatypes are used within this specification.
    Class Definition
    (create issue) A file format or physical medium.
    (create issue) A media type or extent.
    (create issue) rdfs:Literal encoded using the relevant [[ISO8601]] Date and Time compliant string and typed using the appropriate XML Schema datatype (xsd:gYear, xsd:gYearMonth, xsd:date, or xsd:dateTime).
    (create issue) A temporal entity with zero extent or duration.
    (create issue) Decimal represents a subset of the real numbers, which can be represented by decimal numerals. The ·value space· of decimal is the set of numbers that can be obtained by multiplying an integer by a non-positive power of ten, i.e., expressible as i × 10^-n where i and n are integers and n >= 0.
    (create issue) Duration represents a duration of time. The ·value space· of duration is a six-dimensional space where the coordinates designate the Gregorian year, month, day, hour, minute, and second components defined in § 5.5.3.2 of [[ISO8601]], respectively.
    (create issue) Hex-encoded binary data. The ·value space· of hexBinary is the set of finite-length sequences of binary octets.
    (create issue) Number derived from integer by setting the value of minInclusive to be 0.

    Controlled Vocabularies

    Requirements for controlled vocabularies

    The following is a list of requirements that were identified for the controlled vocabularies to be recommended in this Application Profile.

    Controlled vocabularies SHOULD:

    These criteria do not intend to define a set of requirements for controlled vocabularies in general; they are only intended to be used for the selection of the controlled vocabularies that are proposed for this Application Profile.

    Expected usage of controlled vocabularies

    To increase the interoperability, the value spaces of properties can be further harmonised using shared controlled vocabularies. This kind of restriction may be subject to a varying interpretation on what the expected usage of a controlled vocabulary is. To ensure a common interpretation the following expectations are defined:

    The first two (and preferably also the others) SHOULD only be used for requirements that can be verified by a machine. If the validation can only be realised with the involvement of humans, then a less strong requirement (RECOMMMENDED or MAY) is used, even if the intention is to be very strict. This is to ensure that the provided SHACL representations correspond closely to all use cases possible. Stronger enforcements are left for implementations as they have control on actual data exchange.

    Controlled vocabularies to be used

    The table is organised per property and then per class. This is because mostly the used controlled vocabulary is connected with the property and not with the usage context in a class. However this is not mandatory, and it may happen (as it is the case for dct:type) that the same property uses a different controlled vocabulary per class. To disambiguate the usage multiple rows are created. In some cases controlled vocabulary usage is more complicated. For instance in the case of dct:spatial and dct:publisher the usage of the controlled vocabulary is dependent on the actual value used. The value space these properties encompass is very large and there is no universal EU controlled vocabulary at hand that covers the whole value space.

    The last column is a first assessment of the usage of the controlled vocabularies and is open for discussion.

    Compared with DCAT-AP, GeoDCAT-AP makes use of additional controlled vocabularies mandated by [[INSPIRE-MD-REG]], and operated by the INSPIRE Registry - with the only exceptions of the coordinate reference systems register maintained by OGC [[OGC-EPSG]].

    For two of these controlled vocabularies, namely the INSPIRE spatial data themes [[INSPIRE-THEMES]] and the ISO topic categories [[INSPIRE-TC]], the GeoDCAT-AP Working Group has defined a set of harmonised mappings to the EU Vocabularies Data Themes [[EUV-THEMES]], in order to facilitate the identification of the relevant theme in [[EUV-THEMES]] for geospatial metadata. The status of this work, along with links to a machine readable representation of the mappings, is documented on a dedicated page in Joinup [[?GeoDCAT-ACV]].

    Property URI

    Used for Class

    Vocabulary name

    Vocabulary URI

    Usage note

    Expected Usage

    adms:representationTechnique

    Distribution

    INSPIRE Spatial Representation Type [[INSPIRE-SRT]]

    http://inspire.ec.europa.eu/metadata-codelist/SpatialRepresentationType

    GeoDCAT-AP extension.

    AT-LEAST

    adms:status

    Distribution

    Distribution Status Vocabulary [[EUV-DISTS]]

    http://publications.europa.eu/resource/authority/distribution-status

    Inherited from DCAT-AP [[DCAT-AP-3]] MUST

    dcat:hadRole

    Attribution

    INSPIRE Responsible Party Roles [[INSPIRE-RPR]]

    http://inspire.ec.europa.eu/metadata-codelist/ResponsiblePartyRole

    GeoDCAT-AP extension.

    AT-LEAST

    dcat:mediaType

    Distribution

    IANA Media Types [[IANA-MEDIA-TYPES]]

    http://www.iana.org/assignments/media-types

    Inherited from DCAT [[vocab-dcat-3]] MUST

    dcat:compressFormat

    Distribution

    IANA Media Types [[IANA-MEDIA-TYPES]]

    http://www.iana.org/assignments/media-types

    Inherited from DCAT [[vocab-dcat-3]] MUST

    dcat:packageFormat

    Distribution

    IANA Media Types [[IANA-MEDIA-TYPES]]

    http://www.iana.org/assignments/media-types

    Inherited from DCAT [[vocab-dcat-3]] MUST

    dcat:theme

    Dataset

    Catalogue

    Data Service

    Dataset Series

    Dataset Theme Vocabulary [[EUV-THEMES]]

    http://publications.europa.eu/resource/authority/data-theme

    Inherited from DCAT-AP [[DCAT-AP-3]]

    MUST

    INSPIRE Spatial Data Themes [[INSPIRE-THEMES]]

    http://inspire.ec.europa.eu/theme

    Mapping INSPIRE to GeoDCAT-AP

    MAY

    dcatap:availability

    Distribution

    EU Vocabularies Planned availability [[?EUV-PAV]]

    Distribution availability vocabulary

    Inherited from DCAT-AP [[DCAT-AP-3]]

    MUST

    dct:accessRights

    Catalogue

    Dataset

    Dataset Series

    Data Service

    Distribution

    EU Vocabularies Access rights [[?EUV-AR]]

    http://publications.europa.eu/resource/authority/access-right

    Inherited from DCAT-AP [[DCAT-AP-3]]

    MUST

    INSPIRE Limitations on Public Access [[?INSPIRE-LPA]]

    http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess

    GeoDCAT-AP extension.

    MAY

    dct:accrualPeriodicity

    Dataset

    Dataset Series

    EU Vocabularies Frequency Named Authority List [[EUV-FREQ]]

    http://publications.europa.eu/resource/authority/frequency

    Inherited from DCAT-AP [[DCAT-AP-3]]

    MUST

    INSPIRE Maintenance Frequency [[INSPIRE-MF]]

    http://inspire.ec.europa.eu/metadata-codelist/MaintenanceFrequency

    GeoDCAT-AP extension.

    MAY

    dct:format

    Distribution

    EU Vocabularies File Type Named Authority List [[EUV-FT]]

    http://publications.europa.eu/resource/authority/file-type

    Inherited from DCAT-AP [[DCAT-AP-3]]

    MUST

    dct:language

    Catalogue

    Catalogue Record

    Dataset

    Dataset Series

    Data Service

    Distribution

    EU Vocabularies Languages Named Authority List [[EUV-LANG]]

    http://publications.europa.eu/resource/authority/language

    Inherited from DCAT-AP [[DCAT-AP-3]]

    MUST

    dct:publisher

    Catalogue

    Dataset

    Dataset Series

    Data Service

    EU Vocabularies Corporate bodies Named Authority List [[EUV-CB]]

    http://publications.europa.eu/resource/authority/corporate-body

    The Corporate bodies NAL MUST be used for European institutions and a small set of international organisations. In case of other types of organisations, national, regional or local vocabularies should be used.

    MAY

    geodcatap:referenceSystem

    Data Service

    Dataset

    Dataset Series

    Distribution

    OGC EPSG Coordinate Reference Systems Register [[OGC-EPSG]]

    http://www.opengis.net/def/crs/EPSG/0/

    Defined by GeoDCAT-AP

    MUST

    geodcatap:resourceType

    Dataset

    Dataset Series

    Data Service

    INSPIRE Resource Types [[INSPIRE-RT]]

    http://inspire.ec.europa.eu/metadata-codelist/ResourceType

    Defined by GeoDCAT-AP

    MUST

    dct:spatial

    Catalogue

    Dataset

    Dataset Series

    Data Service

    EU Vocabularies Continents Named Authority List [[EUV-CONT]]

    http://publications.europa.eu/resource/authority/continent

    Inherited from DCAT-AP [[DCAT-AP-3]]

    The EU Vocabularies Name Authority Lists must be used for continents, countries and places that are in those lists; if a particular location is not in one of the mentioned Named Authority Lists, [[GEONAMES]] URIs must be used.

    MAY

    EU Vocabularies Countries Named Authority List [[EUV-COUNTRIES]]

    http://publications.europa.eu/resource/authority/country

    EU Vocabularies Places Named Authority List [[EUV-PLACES]]

    http://publications.europa.eu/resource/authority/place

    [[GEONAMES]]

    http://sws.geonames.org/

    geodcatap:serviceCategory

    Data Service

    INSPIRE Spatial Data Service Categories [[INSPIRE-SDSC]]

    http://inspire.ec.europa.eu/metadata-codelist/SpatialDataServiceCategory

    GeoDCAT-AP extension.

    MUST

    geodcatap:serviceProtocol

    Data Service

    INSPIRE Protocol Values [[INSPIRE-PV]]

    https://inspire.ec.europa.eu/metadata-codelist/ProtocolValue

    GeoDCAT-AP extension.

    MUST

    geodcatap:serviceType

    Data Service

    INSPIRE Spatial Data Service Types [[INSPIRE-SDST]]

    http://inspire.ec.europa.eu/metadata-codelist/SpatialDataServiceType

    GeoDCAT-AP extension.

    MUST

    geodcatap:topicCategory

    Catalogue

    Data Service

    Dataset

    Dataset Series

    INSPIRE Topic Categories [[INSPIRE-TC]]

    http://inspire.ec.europa.eu/metadata-codelist/TopicCategory

    GeoDCAT-AP extension.

    MUST

    dct:type

    Agent

    ADMS publisher type [[ADMS-SKOS]] vocabulary

    http://purl.org/adms/publishertype/

    Inherited from DCAT-AP [[DCAT-AP-3]]

    MUST

    dct:type

    Licence Document

    ADMS licence type [[ADMS-SKOS]] vocabulary

    http://purl.org/adms/licencetype/

    Inherited from DCAT-AP [[DCAT-AP-3]]

    MUST

    dct:type

    Test Result (linked from a prov:Activity).

    INSPIRE Degree of Conformity [[INSPIRE-DoC]]

    https://inspire.ec.europa.eu/metadata-codelist/DegreeOfConformity

    GeoDCAT-AP extension.

    AT-LEAST

    sdmx-attribute:unitMeasure

    Quality Measurement

    QUDT Units Vocabulary [[QUDT-UNITS]]

    http://www.qudt.org/vocab/unit

    GeoDCAT-AP extension.

    AT-LEAST

    Other controlled vocabularies

    In addition to the proposed common vocabularies in , which are mandatory to ensure minimal interoperability, implementers are encouraged to publish and to use further region or domain-specific vocabularies that are available online. While those may not be recognised by general implementations of the Application Profile, they may serve to increase interoperability across applications in the same region or domain. Examples are the full set of concepts in EuroVoc [[?EUV-EUROVOC]], the CERIF standard vocabularies [[?CERIF-VOCS]], the Dewey Decimal Classification [[?DDC]] and numerous other schemes.

    For geospatial metadata, the working group has identified the following additional vocabularies:

    Agent Roles

    GeoDCAT-AP supports the 11 agent roles defined in [[INSPIRE-MD-REG]] and [[ISO-19115]] by using two different but not mutually exclusive approaches.

    In the first approach, roles are mapped to specific properties. In particular, GeoDCAT-AP makes use of the relevant properties from [[DCAT-AP-3]] and [[DCTERMS]], which overall cover 4 of the relevant roles - namely, dcat:contactPoint, dct:creator, dct:publisher, and dct:rightsHolder (not supported in [[DCAT-AP-3]]). The remaining 7 are covered by the corresponding properties defined in the GeoDCAT-AP namespace - namely, geodcatap:custodian, geodcatap:distributor, geodcatap:originator, geodcatap:principalInvestigator, geodcatap:processor, geodcatap:resourceProvider, and geodcatap:user.

    It is important to note that, following [[INSPIRE-MD-REG]] and [[ISO-19115]], in GeoDCAT-AP all these agent roles can be specified on Catalogues, Catalogue Records, Datasets, and Data Services.

    The second and more general approach is based on [[PROV-O]], where agent roles are specified via a “qualified attribution” (prov:qualifiedAttribution). More precisely, the relevant Agent is specified via property prov:agent, whereas the role is specified with property dcat:hadRole, which takes as value a skos:Concept describing that role - as those included in the relevant code list operated by the INSPIRE Registry [[INSPIRE-RPR]]. .

    The [[PROV-O]]-based approach is meant to give data providers an extension mechanism to specify, in a harmonised way, any kind of role, and, possibly, to attach additional information to the role and the associated Agent. As such, it MAY be used in combination with or to complement the property-based approach, but it MUST NOT replace it. For instance, it can be used to specify roles not covered by the agent role properties used in GeoDCAT-AP, and/or to specify additional information that cannot be expressed via a property (as the period during which an Agent covered a given role).

    More details on these solutions are available in .

    Accessibility and Multilingual Aspects

    Accessibility in the context of this Application Profile is limited to information about the technical format of distributions of datasets. The properties dcat:mediaType and dct:format provide information that can be used to determine what software can be deployed to process the data. The accessibility of the data within the datasets needs to be taken care of by the software that processes the data and is outside of the scope of this Application Profile.

    Multilingual aspects related to this Application Profile concern all properties whose contents are expressed as strings (i.e. rdfs:Literal) with human-readable text. Wherever such properties are used, the string values are of one of two types:

    Wherever values of properties are expressed with either type of string, the property can be repeated with translations in the case of free text and with parallel versions in case of named entities. For free text, e.g. in the cases of titles, descriptions and keywords, the language tag is mandatory.

    Language tags to be used with rdfs:Literal are defined by [[BCP47]], which allows the use of the "t" extension for text transformations defined in [[RFC6497]] with the field "t0" [[CLDR]] indicating a machine translation.

    A language tag will look like: "en-t-es-t0-abcd", which conveys the information that the string is in English, translated from Spanish by machine translation using a tool named "abcd".

    For named entities, the language tag is optional and should only be provided if the parallel version of the name is strictly associated with a particular language. For example, the name ‘European Union’ has parallel versions in all official languages of the union, while a name like ‘W3C’ is not associated with a particular language and has no parallel versions.

    For linking to different language versions of associated web pages (e.g. landing pages) or documentation, a content negotiation [[CONNEG]] mechanism may be used whereby different content is served based on the Accept-Languages indicated by the browser. Using such a mechanism, the link to the page or document can resolve to different language versions of the page or document.

    All the occurrences of the property dct:language, which can be repeated if the metadata is provided in multiple languages, must have a URI as their object, not a literal string from the [[ISO-639]] code list.

    How multilingual information is handled in systems, for example in indexing and user interfaces, is outside of the scope of this Application Profile.

    High Value Datasets

    In light of the growing importance of data, the European Commission has adopted an implementing regulation focused on high-value datasets on 21 December 2022 [[HVD]]. The ambition of the High-Value Datasets implementing regulation (HVD IR) is to improve the availability, accessibility, quality and reuse of a selective set of core datasets from the public sector whose re-use is associated with important socio-economic benefits. To achieve this the HVD IR sets, among others, requirements on the metadata associated with the disclosed datasets.

    To foster a common approach on using DCAT-AP metadata to describe Datasets that are in scope of the HVD IR a dedicated DCAT-AP annex DCAT-AP HVD [[DCAT-AP-HVD]] is provided. The requirements expressed in DCAT-AP HVD are additional constraints and usages notes which can be directly applied to GeoDCAT-AP 3.0.0.

    Because GeoDCAT-AP is also applicable for datasets that are not within the scope of the HVD IR, the constraints of DCAT-AP HVD are not included in this specification. Implementers of the HVD IR should consult DCAT-AP HVD to check the specific requirements of the HVD IR and the adherence to them. However, since GeoDCAT-AP is mainly used as the DCAT view derived from the INSPIRE ISO metadata [[[#inspire-and-iso-19115-mappings]]], the implementation of the DCAT-AP HVD in the context of a GeoDCAT-AP mapping requires to implement additional mapping rules, specified in [[[#inspire-and-iso-19115-mappings]]].

    A clear mapping between HVD categories and INSPIRE data themes has been early defined by this community during the process of drafting the High-Value Datasets implementing regulation [[HVD]], as illustrated in the figure below:

    Mapping between HVD categories and INSPIRE data themes

    For this reason, the identification of HVD in the scope of INSPIRE is currently relying on this mapping. No additional generic requirements for tagging these datasets are provisioned, except in the case of Integrated Administration and Control System (IACS) agricultural datasets in the scope of the European Common Agricultural Policy (CAP), mainly represented by the Land Parcel Identification System (LPIS) and the Geospatial Aid application (GSAA) datasets.

    Despite IACS datasets are in the scope of either the Land cover, Land use, Cadastral parcels, Agricultural facilities and/or Area management zones INSPIRE themes, there is a need to further facilitate their discoverability among other datasets belonging to the Geospatial HVD category (See the Annex of the Implementing Regulation focused on high-value datasets on 21 December 2022 [[HVD]]). Additionally, a need to classify them as Reference parcels or Agricultural parcels as defined in Regulation (EU) No 1306/2013 of the European Parliament and of the Council [[AGRI-POLICY]] and of Regulation (EU) No 1307/2013 of the European Parliament and of the Council [[AGRI-POLICY-FARMERS]], respectively.

    To satisfy these needs, the "INSPIRE Technical guidelines on IACS spatial data sharing. Part 1 - Data discovery" [[IACS]] sets specific requirements and recommendations for describing IACS datasets through the INSPIRE infrastructure.

    The INSPIRE Maintenance and Implementation Group (MIG) is discussing potential additional requirements and recommendations for the provision of INSPIRE HVD datasets and their corresponding metadata (e.g. on metadata tagging) as part of the ongoing activities of its Ad-hoc Subgroup on the Alignment of INSPIRE and High-Value Datasets implementation (MIG Action 2.5) [[A2.5]]. This specification will be duly updated in case additional provisions enter into force in the future.

    Legal information

    The considerations for expressing legal information follow the guidelines and approach of DCAT-AP. Readers should consult the DCAT-AP section on legal information.

    The HVD IR [[HVD]] imposes additional quality requirements on legal information. An elaboration of these is found in the section legal information in DCAT-AP HVD.

    Implementers of mappings from INSPIRE ISO metadata should take these considerations into account to ensure that the legal information is shared correctly.

    Privacy and security considerations

    GeoDCAT-AP supports the attribution of data and metadata to various participants such as resource creators, publishers and other parties or agents, and as such defines terms that may be related to personal information. In addition, it also supports the association of rights and licenses with catalogued Resources and Distributions. These rights and licenses could potentially include or reference sensitive information such as user and asset identifiers as described in [[VOCAB-ODRL]].

    Implementations that produce, maintain, publish or consume such vocabulary terms must take steps to ensure security and privacy considerations are addressed at the application level.

    Conformance Test Results

    Following [[INSPIRE-MD-REG]] and [[ISO-19115]], GeoDCAT-AP supports the specification of test results to assess the degree of conformity of a resource (i.e., a Catalogue, a Dataset, a Data Service) with a given specification (e.g., a standard, a set of implementing rules, a set of data quality or interoperability criteria).

    For this purpose, GeoDCAT-AP makes use of two different but not mutually exclusive approaches. More precisely, property dct:conformsTo is used when the test result states that a resource is conformant with a given specification. The more general approach is based on [[PROV-O]], and it specifies conformance test results as a testing activity (prov:Activity) that generates a result (specified with property prov:generated), corresponding to one of the degrees of conformity defined in [[INSPIRE-MD-REG]], and available from the INSPIRE Registry [[INSPIRE-DoC]]. The specification against which the testing activity is carried out is specified via a “qualified association” (prov:qualifiedAssociation), linked to a “plan” (prov:hadPlan) derived from (prov:wasDerivedFrom) the specification itself.

    More details on these solutions are available in .

    Validation of GeoDCAT-AP

    Validation of a catalogue according to GeoDCAT-AP can be approached from different perspectives. One perspective is to consider GeoDCAT-AP as an extension to DCAT-AP and thus implement a two staged process: first validation against DCAT-AP and then additionally validate the GeoDCAT-AP specific constraints. Another perspective is to consider this specification as a standalone specification and validate all constraints at once. Besides these there are many other validation perspectives possible. For additional considirations on validation consult the section Validation in DCAT-AP.

    As there is yet not preferred perspective decided nor requested by the community, a similar to DCAT-AP SHACL artefact with all the constraints is provided. The shape is downloadable here.

    INSPIRE and ISO 19115 Mappings

    Objectives

    The objective of this work is to define an RDF syntax that can be used for the exchange of descriptions of spatial datasets, dataset series, and services among data portals. The RDF syntax should extend the DCAT Application Profile for data portals in Europe [[DCAT-AP-3]].

    Additionally, the following outcomes may be achieved, outside the context of this specification:

    Motivation and use cases

    The basic use case that GeoDCAT-AP intends to enable is a cross-domain data portal search for datasets, as documented in the DCAT-AP specification [[DCAT-AP-3]]. GeoDCAT-AP will make it easier to share descriptions of spatial datasets between spatial data portals and general data portals, and thus help increase public and cross-sector access to such high value datasets. The datasets could include:

    Datasets on the INSPIRE Geoportal

    The INSPIRE Geoportal aggregates metadata for over 100k datasets across Europe. It provides the means to search for spatial data sets and spatial data services, and subject to access restrictions, to view spatial data sets from the EU Member States within the framework of the INSPIRE Directive. The metadata stored on this portal is structured according to the INSPIRE Metadata Technical Guidelines [[INSPIRE-MD]]. In order to maximise visibility and re-use, spatial datasets could also be listed on general-purpose Open Data Portals, such as the European Union Open Data Portal (EU ODP) and the European Data Portal (EDP).

    Datasets on national SDIs

    GeoDCAT-AP would facilitate the integration of SDIs operated by EU Member States with any data catalogue able to consume [[DCAT-AP-3]]-compliant metadata.

    General geospatial datasets

    The geospatial community shares a common background and makes consistent use of consolidated standards and technologies. In particular, as far as metadata are concerned, it is widespread to use standards like [[ISO-19115]] / [[ISO-19139]], for the representation and encoding of metadata, and OGC’s [[?CSW]] (Catalog Service for the Web) for accessing and querying metadata records. These standards are also those currently recommended in INSPIRE.

    An additional RDF syntax for INSPIRE and ISO 19115 metadata elements is beneficial, especially when other data portals support the [[DCAT-AP-3]] metadata elements only.

    Conversion rules to RDF syntax would allow Member States to maintain their collections of INSPIRE-relevant datasets following the INSPIRE Metadata Technical Guidelines [[INSPIRE-MD]], while at the same time publishing these collections on [[DCAT-AP-3]]-conformant data portals. A conversion to RDF syntax – using for example the GeoDCAT-AP XSLT script [[GeoDCAT-XSLT]] - allows additional metadata elements to be displayed on general-purposed data portals, provided that such data portals are capable of displaying additional metadata elements. Furthermore, data portals are frequently complemented by a triple store, making the full set of GeoDCAT-AP metadata queryable through a SPARQL endpoint [[SPARQL11-QUERY]].

    Supported tooling

    To support the transformation from INSPIRE metadata to GeoDCAT-AP compliant metadata an XSLT tool was developed. This tool has been updated to transform data to be compliant with GeoDCAT-AP 3.0.0. The GeoDCAT-AP XSLT can be found on the dev branch of the GitHub repository. The XSLT can be run directly on the output of a CSW or on single metadata records, by using any of the programming languages supporting XSLT conversion. Additionally, a proof-of-concept API has been developed to facilitate the testing of the XSLT on single metadata records or on top of a CSW endpoint.

    Methodology and summary of results

    Methodologically, the development of GeoDCAT-AP implies three main interrelated tasks:

    1. Definition of alignment criteria and requirements.

    2. Identification of the metadata elements to be covered by GeoDCAT-AP.

    3. Definition of alignments for the metadata elements to be covered by GeoDCAT-AP.

    These tasks and their results are described in the following sections.

    Alignment criteria and requirements

    The overall objective of GeoDCAT-AP is twofold:

    1. Provide a [[DCAT-AP-3]]-conformant representation of geospatial metadata.

    2. Provide an as much as possible comprehensive RDF-based representation of geospatial metadata, based on widely used vocabularies, trying, at the same time, to avoid semantic loss and to promote cross-domain re-use.

    3. Ensure backward compatibiliy with previous versions of GeoDCAT-AP.

    The first two goals, having a different scope and applying to different use cases (see ), are reflected in the two mapping profiles of GeoDCAT-AP, core and extended, described in .

    Note that point (1) implies that:

    • GeoDCAT-AP must include, at least, all the mandatory [[DCAT-AP-3]] elements.

    • Vocabularies different from [[DCAT-AP-3]] can be used only for those geospatial metadata elements not supported in [[DCAT-AP-3]].

    Another key criterion was to base as much as possible the defined alignments on existing practices, in particular those contributed by the GeoDCAT-AP WG. The objective was to build upon experiences having already addressed issues in scope of GeoDCAT-AP, and to avoid a negative impact on existing implementations.

    Finally, as already mentioned in , whenever no suitable candidates were available in existing vocabularies to represent geospatial metadata elements, the possibility of defining new terms was not excluded. However, this option needed to be carefully assessed, and discarded whenever it might have led to a specification that was conflicting with standards under preparation.

    As it will be explained in , no new terms have been defined in the current version of GeoDCAT-AP.

    Metadata elements to be covered by GeoDCAT-AP

    The general criterion used for this task was that GeoDCAT-AP would ideally cover all the metadata elements of the core profile of [[ISO-19115]] and those defined in INSPIRE, with the requirement that only optional elements MAY be excluded.

    Based on this, the current version of GeoDCAT-AP covers the following set of metadata elements:

    • All the metadata elements in the core profile of [[ISO-19115]].

    • All the metadata elements defined in INSPIRE, with the exclusion of those not common to all the INSPIRE spatial data themes.

    More precisely, the supported INSPIRE metadata elements include:

    • The set of metadata elements defined in the INSPIRE Metadata Regulation [[?INSPIRE-MD-REG]].

    • The set of metadata elements defined in the INSPIRE Data and Services Regulation (Article 13: “Metadata required for Interoperability”) [[INSPIRE-SDSS-REG]]. These elements are also listed in Appendix C.3 to the INSPIRE Metadata Technical Guidelines (version 2.2.0) [[INSPIRE-MD]].

    • The set of metadata elements recommended as common to most of the INSPIRE spatial data themes in the INSPIRE Data Specifications Technical Guidelines, and listed in the first table included in Appendix C.7 to the INSPIRE Metadata Technical Guidelines (version 2.2.0) [[INSPIRE-MD]]. These elements are the following ones:

      • Maintenance information.

      • Conceptual and domain consistency (Data quality – Logical consistency).

    The full list of metadata elements covered by the current version of GeoDCAT-AP is available in to this document.

    The metadata elements not supported in the current version of GeoDCAT-AP are those recommended only for specific INSPIRE spatial data themes in the INSPIRE Data Specifications Technical Guidelines, and listed in Appendix C.7 to the INSPIRE Metadata Technical Guidelines (version 2.2.0) [[INSPIRE-MD]].

    These elements have been excluded in the current version of GeoDCAT-AP for the following reasons:

    • The priority was to support all those elements relevant to any dataset.

    • These elements are all optional.

    Support to these metadata elements might be provided in future versions of GeoDCAT-AP.

    Alignments defined in GeoDCAT-AP

    The alignments defined in the current version of GeoDCAT-AP are the result of an iterative revision process of [[GeoDCAT-AP-20201223]], following the criteria illustrated in the previous sections and the review of the GeoDCAT-AP WG. Alignments for [[ISO-19115-1]] have not been defined. contains an overview of the most important changes with respect to [[ISO-19115]].

    The work started with the review of [[DCAT-AP-3]], [[VOCAB-DCAT-3]], and [[INSPIRE-MD]], with the purpose of identifying possible disalignments of the mappings defined in [[GeoDCAT-AP]], as well as possible gaps in [[DCAT-AP-3]] and [[VOCAB-DCAT-3]], which may require the use of different vocabularies or the definition of new classes and/or properties in the GeoDCAT-AP namespace. In all these cases, backward compatibility with [[GeoDCAT-AP-20201223]] has been taken into account when implementing revisions.

    Finally, the GeoDCAT-AP WG has worked in close coordination with the DCAT-AP WG, in order to ensure mutual compliance of the proposed solutions.

    The results of this work, reflected in the current version of GeoDCAT-AP, can be summarised as follows:

    • Backward compatibility with [[GeoDCAT-AP-20201223]] is ensured: The revised mappings have been deprecated, but maintained in the mapping rules implemented in [[GeoDCAT-XSLT]] along with the new one, in the extended mapping profile of GeoDCAT-AP, and their support has been included in .

    • Compliance with [[DCAT-AP-3]] is ensured: The geospatial metadata elements covered by the defined mappings include all those that in [[DCAT-AP-3]] are mandatory, plus a subset of those that are recommended and optional.

    • GeoDCAT-AP offers alignments for all the metadata elements illustrated in , by using existing vocabularies, and without defining new terms.

    The majority of the alignments defined in GeoDCAT-AP provide a complete representation of the corresponding geospatial metadata elements, but some metadata elements have open issues:

    • Partial mappings: For some metadata elements, only a partial mapping is available. This concerns data quality and maintenance information, for which only the mandatory components have been mapped (for more details, see and , respectively). This decision was taken because existing vocabularies did not offer the ability to represent all the components of these metadata elements.

    The details of the alignments defined in GeoDCAT-AP are illustrated in the following section.

    RDF syntax bindings for INSPIRE and ISO 19115 metadata elements

    The following sections provide the list of the bindings defined in GeoDCAT-AP for the RDF representation of INSPIRE metadata and the core profile of [[ISO-19115]].

    For detailed usage notes and examples of each of the metadata elements covered by GeoDCAT-AP, we refer the reader to (the relevant section is specified in the “comments” column of the mapping table).

    Overview of bindings for GeoDCAT-AP Core

    This section provides an overview of GeoDCAT-AP Core. This includes bindings for metadata elements of the INSPIRE metadata and metadata elements in the core profile of [[ISO-19115]] core for which DCAT-AP provides an RDF syntax binding. Those metadata elements for which [[DCAT-AP-3]] does not provide a binding are part of the GeoDCAT-AP Extended mapping profile described in .

    GeoDCAT-AP Core is meant to enable the harvesting and re-use of spatial metadata records through [[DCAT-AP-3]]-conformant applications and services, including data portals and APIs. The alignments for INSPIRE and [[ISO-19115]] metadata elements that are not included in GeoDCAT-AP Core are defined in GeoDCAT-AP Extended, see .

    In the following table, the starred elements (*) are used to indicate the corresponding metadata element in the core profile of [[ISO-19115]]. For each element, it is indicated whether the element is mandatory (M), optional (O), conditional (C), or recommended (R) in either specification.

    INSPIRE metadata

    *ISO 19115:2003 Core Profile

    DCAT-AP Property Domain Range Comments

    Resource title (M)

    *Dataset title (M)

    dct:title (M)

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    rdfs:Literal See

    Resource abstract (M)

    *Abstract describing the dataset (M)

    dct:description (M)

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    rdfs:Literal See

    Resource type (M)

    *not in ISO 19115 core

    rdf:type (M)

    (see also binding for GeoDCAT-AP Extended)

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    rdfs:Class

    (values dcat:Catalog, dcat:Dataset, dcat:DatasetSeries, dcat:DataService)

    See . dcat:Catalog can be used for catalogue / discovery services, in addition to dcat:DataService.

    Resource locator (C)

    *On-line resource (O)

    See . The defined encoding depends whether the resource is a service or a dataset or data series. Also, the value of the function code (CI_OnlineFunctionCode) is to be taken into account.

    For services

    foaf:homepage

    dcat:endpointURL

    dcat:endpointDescription

    dcat:Catalog

    dcat:DataService

    foaf:Document rdfs:Resource foaf:Document See . Properties dcat:endpointURL and dcat:endpointDescription are used when the resource locator points to a service endpoint.

    For dataset and data series (function code not provided)

    dcat:landingPage (O)

    dcat:Dataset

    dcat:DatasetSeries

    foaf:Document See .

    For dataset and data series (‘download’ function code)

    dcat:accessURL (M) dcat:Distribution rdfs:Resource See . Property dcat:accessURL is also used whenever the resource locator points to a service endpoint.

    For dataset and data series (‘information’ function code)

    foaf:page

    dcat:Dataset

    dcat:DatasetSeries

    foaf:Document See .

    For dataset and data series (‘offlineAccess’ function code)

    dcat:accessURL (M) dcat:Distribution rdfs:Resource See . Property dcat:accessURL is also used whenever the resource locator points to a service endpoint.

    For dataset and data series (‘order’ function code)

    dcat:accessURL (M) dcat:Distribution rdfs:Resource See . Property dcat:accessURL is also used whenever the resource locator points to a service endpoint.

    For dataset and data series (‘search’ function code)

    foaf:page

    dcat:Dataset

    dcat:DatasetSeries

    foaf:Document See .

    Unique resource identifier (M)

    *not in ISO 19115 core

    dct:identifier (O)

    dcat:Dataset

    dcat:DatasetSeries

    rdfs:Literal See . In RDF, this could also be represented as the URI of the dataseti or of the dataset series.

    Resource language (C)

    *Dataset language (M)

    dct:language (O for dcat:Dataset and dcat:DatasetSeries, R for dcat:Catalog)

    dcat:Dataset

    dcat:DatasetSeries

    dcat:Catalog

    dct:LinguisticSystem See .

    Keyword value (M)

    *not in ISO 19115 core

    dcat:keyword (R)

    dcat:theme (R)

    (see also binding for GeoDCAT-AP Extended)

    dcat:Dataset

    rdfs:Literal

    See . For datasets and data series, dcat:keyword is used for free keywords; dcat:theme for controlled vocabularies.

    Keywords whose controlled vocabulary is the one of the INSPIRE spatial data themes are mapped to dcat:theme, and expressed by the corresponding URI in the INSPIRE Registry. See controlled vocabulary for theme in .

    For services a syntax binding is provided in GeoDCAT-AP Extended only.

    Geographic bounding box (M)

    *Geographic location of the dataset (by four coordinates or by geographic identifier) (C)

    dct:spatial (O)

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dct:Location See on the preferred format to be used in RDF for the representation of geometries.

    Temporal extent (C)

    *Additional extent information for the dataset (vertical and temporal) (O)

    dct:temporal (O)

    dcat:Dataset

    dcat:DatasetSeries

    dct:PeriodOfTime See .

    Date of publication (C)

    *Dataset reference date (M) – publication

    dct:issued (R for dcat:Catalog and O for dcat:Dataset and dcat:DatasetSeries)

    dcat:Dataset

    dcat:DatasetSeries

    dcat:Catalog

    Temporal Literal See .

    Date of last revision (C)

    *Dataset reference date (M) – revision

    dct:modified (R for dcat:Catalog and O for dcat:Dataset and dcat:DatasetSeries)

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    Temporal Literal See .

    Spatial resolution (C)

    *Spatial resolution of the dataset (O)

    dcat:spatialResolutionInMeters (O)

    dcat:Dataset

    dcat:DatasetSeries

    xsd:decimal See . Property dcat:spatialResolutionInMeters can only be used when spatial resolution is expressed as distance in metres.

    Lineage (M)

    *Lineage (O)

    dct:provenance (O)

    dcat:Dataset

    dcat:DatasetSeries

    dct:ProvenanceStatement See .

    Conformity (M)

    *not in ISO 19115 core

    dct:conformsTo (O)

    (see also binding for GeoDCAT-AP Extended)

    dcat:Dataset

    dcat:DatasetSeries

    dct:Standard See . dct:conformsTo can be used to specify only one of the cases supported in INSPIRE. i.e., when the degree of conformity is “conformant”.

    Conformity Specification (M)

    *not in ISO 19115 core

    dct:title (R)

    dct:issued (R)

    dct:modified (O)

    dct:created (O)

    (see also binding for GeoDCAT-AP Extended)

    rdfs:Resource Temporal Literal See .

    Conditions for access and use (M)

    *not in ISO 19115 core

    dct:license (R for dcat:Catalog and dcat:Distribution, O for dcat:DataService), dct:rights (O)

    dcat:Catalog

    dcat:Distribution

    dcat:DataService

    dct:LicenseDocument See .

    Limitations on public access (C)

    *not in ISO 19115 core

    dct:accessRights (O)

    dcat:DataService

    dct:RightsStatement See .

    Responsible party (M)

    *Dataset responsible party (O)

    dct:publisher (M)

    dct:creator (O)

    dcat:Catalog

    foaf:Agent

    See . [[DCAT-AP-3]] supports only 3 of the 11 responsible party roles supported in INSPIRE. GeoDCAT-AP Extended makes use of [[PROV-O]] to specify information concerning provenance not covered in [[DCAT-AP-3]].

    dct:publisher (R)

    dcat:contactPoint (R)

    dct:creator (O)

    dcat:Dataset

    dcat:DatasetSeries

    foaf:Agent

    vcard:Kind

    foaf:Agent

    Encoding (M)

    *Distribution format (O)

    dct:format (R), dcat:mediaType (O) dcat:Distribution dct:MediaTypeOrExtent See . See controlled vocabularies for encoding in .

    Maintenance information (R)

    *not in ISO 19115 core

    dct:accrualPeriodicity (O)

    dcat:Dataset

    dcat:DatasetSeries

    dct:Frequency See .
    *Metadata standard dct:conformsTo (R)

    dcat:CatalogRecord

    dct:Standard See . This element, not existing in ISO 19115, is just meant to provide the context for the specification of the metadata standard name and version.
    *Metadata standard name (O) dct:title

    dct:Standard

    rdfs:Literal See .
    *Metadata standard version (O) owl:versionInfo

    dct:Standard

    rdfs:Literal See . This can be part of the information specified for metadata standard name.

    Metadata date (M)

    *Metadata date stamp (M)

    dct:modified (M)

    dcat:CatalogRecord

    Temporal Literal See .

    Metadata language (M)

    *Metadata language (C)

    dct:language (O)

    dcat:CatalogRecord

    dct:LinguisticSystem See .

    Overview of bindings for GeoDCAT-AP Extended

    This section provides an overview of the RDF syntax bindings in GeoDCAT-AP Extended. This GeoDCAT-AP mapping profile covers elements defined in INSPIRE and the core profile of [[ISO-19115]], for which [[DCAT-AP-3]] does not provide a syntax binding. GeoDCAT-AP Extended is a superset of GeoDCAT-AP Core.

    The following table contains the defined RDF syntax binding for INSPIRE metadata. In the table below, the starred elements (*) are used to indicate the corresponding metadata element in the core profile of [[ISO-19115]]. For each metadata element, it is indicated whether the element is mandatory (M), optional (O), conditional (C), or recommended (R) in either specification.

    Please note that some metadata elements have an RDF syntax binding in both the GeoDCAT-AP Core and Extended mapping profile. These elements fall in one of these categories:

    1. Partial coverage by a [[DCAT-AP-3]] binding: This concerns conformity (only degree of conformity equal to “conformant” is supported) and responsible organisation (only responsible party roles creator, publisher, and point of contact are supported).

    2. Subsumption by a GeoDCAT-AP RDF binding: ISO metadata elements available in GeoDCAT-AP Core, but for which only a many-to-one mapping is supported in [[DCAT-AP-3]].

    In order to preserve the original semantics, the extended mapping profile of GeoDCAT-AP defines additional alignments to those included in GeoDCAT-AP Core. The two sets of alignments are not mutually exclusive, and can coexist without creating conflicts.

    INSPIRE metadata

    *ISO 19115:2003 Core Profile

    Property Domain Range Comments

    Resource type (M)

    *not in ISO 19115 core

    geodcatap:resourceType

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    skos:Concept

    See and the controlled vocabulary for resource type in . [[DCAT-AP-3]] supports the use of dct:type on dct:Dataset only.

    Unique resource identifier (M)

    *not in ISO 19115 core

    dct:identifier

    dcat:Catalog

    dcat:DatasetSeries

    dcat:DataService

    rdfs:Literal See . In RDF, this could also be represented as the URI of the resource.

    Resource language (C)

    *Dataset language (M)

    dct:language

    dcat:DatasetSeries

    dcat:DataService

    dct:LinguisticSystem See .

    Topic category (M)

    *Dataset topic category (M)

    geodcatap:topicCategory

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    skos:Concept

    See and the controlled vocabulary for topic category in .

    Spatial data service type (M)

    *not in ISO 19115

    geodcatap:serviceType

    dcat:DataService

    skos:Concept

    See . See controlled vocabulary for spatial data service type in .

    Keyword value (M)

    *not in ISO 19115 core

    dcat:keyword

    dcat:theme

    geodcatap:serviceCategory

    dcat:Catalog

    dcat:DatasetSeries

    dcat:DataService

    rdfs:Literal

    skos:Concept

    See .

    Originating controlled vocabulary (C)

    *not in ISO 19115 core

    skos:inScheme skos:Concept skos:ConceptScheme See .

    Geographic bounding box (M)

    *Geographic location of the dataset (by four coordinates or by geographic identifier) (C)

    dct:spatial (O)

    dcat:DataService

    dct:Location See on the preferred format to be used in RDF for the representation of geometries.

    Temporal extent (C)

    *Additional extent information for the dataset (vertical and temporal) (O)

    dct:temporal (O)

    dcat:Catalog

    dcat:DataService

    dct:PeriodOfTime See .

    Date of publication (C)

    *Dataset reference date (M) – publication

    dct:issued

    dcat:DataService

    Temporal Literal See .

    Date of last revision (C)

    *Dataset reference date (M) – revision

    dct:modified

    dcat:DataService

    Temporal Literal See .

    Date of creation (C)

    *Dataset reference date (M) - creation

    dct:created

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    Temporal Literal See .

    Spatial resolution (C)

    *Spatial resolution of the dataset (O)

    dcat:spatialResolutionInMeters

    dcat:DatasetSeries

    dcat:DataService

    xsd:decimal See . Property dcat:spatialResolutionInMeters can only be used when spatial resolution is expressed as distance in metres. Property dqv:hasQualityMeasurement can be used to specify any type of spatial resolution. Property geodcatap:spatialResolutionAsText is used only in case spatial resolution is specified as free-text.

    dqv:hasQualityMeasurement

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    dqv:QualityMeasurement

    geodcatap:spatialResolutionAsText

    rdfs:Literal

    Conformity (M)

    *not in ISO 19115 core

    prov:wasUsedBy

    prov:Entity

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    prov:Activity See .

    Conformity Specification (M)

    *not in ISO 19115 core

    prov:wasDerivedFrom prov:Entity prov:Entity See .

    Conformity degree (M)

    *not in ISO 19115 core

    prov:generated prov:Activity prov:Entity See and the controlled vocabulary for conformity degree in .

    Topological Consistency (C)

    *not in ISO 19115 core

    - - - See . No syntax binding is provided for data quality, other than data conformity.

    Data Quality – Logical Consistency – Conceptual Consistency, Domain Consistency – (R)

    *not in ISO 19115 core

    - - - See . No syntax binding is provided for data quality, other than conformity.

    Limitations on public access (C)

    *not in ISO 19115 core

    dct:accessRights (O), dct:rights (O)

    dcat:Catalog

    dcat:Distribution

    dcat:DataService

    dct:RightsStatement See .

    Responsible party (M)

    *Dataset responsible party (O)

    dct:publisher

    dct:creator

    dcat:CatalogRecord

    dcat:DataService

    foaf:Agent See .
    dcat:contactPoint

    dcat:Catalog

    dcat:CatalogRecord

    dcat:DataService

    vcard:Kind

    dct:rightsHolder

    geodcatap:custodian

    geodcatap:distributor

    geodcatap:originator

    geodcatap:principalInvestigator

    geodcatap:processor

    geodcatap:resourceProvider

    geodcatap:user

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:CatalogRecord

    dcat:DataService

    foaf:Agent
    prov:qualifiedAttribution

    prov:Entity

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:CatalogRecord

    dcat:DataService

    prov:Attribution
    Responsible party role (M) dcat:hadRole

    prov:Attribution

    dcat:Role See and controlled vocabulary for responsible party role in .
    *Metadata file identifier (O) dct:identifier

    dcat:CatalogRecord

    rdfs:Literal See . In RDF, this could also be represented as the URI of the metadata / catalogue record.

    Metadata point of contact (M)

    *Metadata point of contact (M)

    dcat:contactPoint

    dcat:CatalogRecord

    vcard:Kind See .
    prov:qualifiedAttribution

    dcat:CatalogRecord

    prov:Attribution
    *Metadata character set (C)

    -

    -

    -

    Metadata in GeoDCAT-AP are always in UTF-8. See .

    Coordinate Reference System (M)

    *Reference System (0)

    geodcatap:referenceSystem

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    dcat:Distribution

    skos:Concept See .

    Temporal Reference System (C)

    *Reference System (0)

    geodcatap:referenceSystem

    dcat:Catalog

    dcat:Dataset

    dcat:DatasetSeries

    dcat:DataService

    dcat:Distribution

    skos:Concept See .

    Character Encoding (C)

    *Dataset character set (C)

    cnt:characterEncoding

    dcat:Distribution

    rdfs:Literal See .

    Spatial representation type – (M)

    *Spatial representation type (O)

    adms:representationTechnique dcat:Distribution skos:Concept See .

    Overview of metadata elements covered by GeoDCAT-AP

    The following table provides an overview of the metadata elements in the INSPIRE metadata schema and in the core profile of [[ISO-19115]], and the available mappings in [[DCAT-AP-3]] and GeoDCAT-AP. Columns titled with “obligation” specify whether the corresponding metadata elements are mandatory (M), conditional (C), and optional (O) (where “conditional” means “mandatory under given conditions”).

    Note that the mappings covered by [[DCAT-AP-3]] correspond to those defined in GeoDCAT-AP core, whereas those covered only by GeoDCAT-AP correspond to those defined in the GeoDCAT-AP extended.

    INSPIRE Obligation ISO 19115 Core Obligation DCAT-AP GeoDCAT-AP
    Metadata point of contact M Metadata point of contact M Yes
    Metadata date M Metadata date stamp M Yes Yes
    Metadata language M Metadata language C Yes Yes
    Metadata character set C Always UTF-8
    Metadata file identifier O Yes
    Metadata standard name O Yes
    Metadata standard version O Yes
    Resource title M Dataset title M Yes Yes
    Temporal reference - Date of creation / publication / last revision C Dataset reference date M Partially (creation date not included) Yes
    Resource abstract M Abstract describing the dataset M Yes Yes
    Resource language C Dataset language M Yes Yes
    Topic category M Dataset topic category M Yes
    Geographic bounding box M Geographic location of the dataset (by four coordinates or by geographic identifier) C Yes Yes
    Character encoding C Dataset character set C Yes
    Temporal reference - Temporal extent C Additional extent information for the dataset (vertical and temporal) O Partially (temporal extent only) Partially (temporal extent only)
    Lineage M Lineage O Yes Yes
    Spatial representation type M Spatial representation type O Yes
    Encoding M Distribution format O Yes Yes
    Spatial resolution C Spatial resolution of the dataset O Yes (but only as horizontal ground distance) Yes
    Responsible organisation M Dataset responsible party O Partially (only 3 of the 11 responsible party roles are supported) Yes
    Resource locator C On-line resource O Yes Yes
    Coordinate reference system; Temporal reference system M; C Reference system O Yes
    Conformity M Yes Yes
    Resource type M Yes Yes
    Spatial data service type M Yes
    Keyword M Partially (only for datasets and dataset series) Yes
    Coupled resource C Yes Yes
    Unique resource identifier M Yes Yes
    Conditions for access and use M Yes Yes
    Limitations on public access M Yes Yes
    Maintenance information O Partially (only maintenance and update frequency) Partially (only maintenance and update frequency)
    Data quality – Logical consistency – Topological consistency C Partially (only conformance results)
    Data quality – Logical consistency – Conceptual consistency O Partially (only conformance results)
    Data quality – Logical consistency – Domain consistency O Partially (only conformance results)

    Detailed usage notes and examples

    This annex contains further usage notes and examples on the mappings summarised in .

    Resource title - *Dataset title

    The content of the element ‘resource title’ can be represented in RDF as a plain literal, and by using property dct:title.

    This binding may also include the specification of the language by using attribute @xml:lang [[XML]]. The language to be specified is the one indicated by element metadata language, mapped to the language identifiers defined by IETF BCP 47 [[BCP47]].

    Resource abstract - *Abstract describing the dataset

    The content of the elements ‘resource abstract’ can be represented in RDF as a plain literal, and by using property dct:description.

    This binding may also include the specification of the language by using attribute @xml:lang [[XML]]. The language to be specified is the one indicated by element metadata language, mapped to the language identifiers defined by IETF BCP 47 [[BCP47]].

    Resource type - *not in ISO 19115 core

    [[VOCAB-DCAT-3]] and [[DCAT-AP-3]] provide specific classes that can be used to represent the INSPIRE notions of dataset, dataset series, and service, namely, dcat:Dataset, dcat:DatasetSeries, and dcat:DataService.

    In order to explicitly indicate the correspondence with the relevant INSPIRE resource types, following the work on aligning INSPIRE Metadata and Dublin Core [[?INSPIRE-DC]], in the extended mapping profile of GeoDCAT-AP they will be denoted by using the resource type code list operated by the INSPIRE Registry [[INSPIRE-RT]], and by using geodcatap:resourceType. More precisely, the following URIs SHOULD be used to denote, respectively, dataset, series, and services:

    Additionally, the spatial data service type can be specified by using geodcatap:serviceType with the corresponding code lists operated by the INSPIRE Registry [[INSPIRE-SDST]].

    Resource locator - *On-line resource

    In INSPIRE, this element, quoting, defines the link(s) to the resource and/or the link to additional information about the resource. [[VOCAB-DCAT-3]] has a property, namely, dcat:landingPage, having exactly the same purpose.

    [[ISO-19115]] offers however the ability to specify the “type” of resource locator by using a specific code list (CI_OnlineFunctionCode), described in the following table:

    ISO 19115 – CI_OnlineFunctionCode Description
    download online instructions for transferring data from one storage device or system to another
    information online information about the resource
    offlineAccess online instructions for requesting the resource from the provider
    order online order process for obtaining the resource
    search online search interface for seeking out information about the resource

    Based on this, the mappings of element “resource locator” for data sets and data set series will vary depending on the function code (when available), based on the following table.

    ISO 19115 – CI_OnlineFunctionCode Property Domain Range
    (not provided) dcat:landingPage dcat:Dataset foaf:Document
    download dcat:accessURL dcat:Distribution rdfs:Resource
    Information foaf:page dcat:Dataset foaf:Document
    offlineAccess dcat:accessURL dcat:Distribution rdfs:Resource
    order dcat:accessURL dcat:Distribution rdfs:Resource
    search foaf:page dcat:Dataset foaf:Document

    However, whenever the URL points to a service endpoint, the resource locator SHOULD be always mapped to property dcat:accessURL, and complemented by additional two properties, namely, dcat:endpointURL and dcat:endpointDescription.

    More precisely, if the URL is recognised as pointing to a capabilities document, the URL is mapped to property dcat:endpointDescription, whereas property dcat:endpointURL will take as value the URL without it query string component.

    Properties dcat:endpointURL and dcat:endpointDescription will have as domain class dcat:DataService, linked to the dataset distribution via property dcat:accessService.

    Finally, whenever it is possible to recognise the service protocol, this information will be specified by property geodcatap:serviceProtocol, taking as value the URI of the relevant specification from the INSPIRE Registry's code list for protocol values [[INSPIRE-PV]].

    As far as services are concerned, the resource locator SHOULD be mapped to properties dcat:endpointURL, dcat:endpointDescription, and dct:conformsTo, as described above.

    Unique resource identifier - *not in ISO 19115 core

    In INSPIRE, this element is meant to uniquely identify a resource (dataset, series or service), and it is mandatory for datasets and series. It is specified by (a) a mandatory character string code and by (b) an optional character string namespace.

    Based on [[DCAT-AP-3]], unique resource identifiers are mapped to dct:identifier (see ). The actual value is obtained by the concatenation of the values of the namespace (if specified) and of the code in the original metadata record.

    If the unique resource identifier is specified with or can be encoded as an HTTP URI, it can be used as the URI of the resource (see ).

    Coupled resource - *not in ISO 19115 core

    This element is used to link a service to the target datasets or dataset series.

    Following [[VOCAB-DCAT-3]] and [DCAT-AP-3], this relationship is specified by using property dcat:servesDataset.

    The target dataset or series SHOULD be preferably referred to by using its unique resource identifier, as in .

    Resource language and metadata language - *Dataset language and Metadata language

    In INSPIRE metadata, metadata and resource languages (which may be different) are specified by using the three-letter language codes defined in [[?ISO-639-2]].

    Based on [[DCAT-AP-3]], both elements are specified with property dct:language, with the URI of the relevant language available from the relevant register operated by the EU Publications Office [[EUV-LANG]].

    assumes that the metadata language is Dutch, and the resource language is German.

    The metadata language can be also used to specify the language of textual elements of resource metadata by using the @xml:lang attribute [[XML]].

    Since @xml:lang takes as value language identifiers defined by IETF BCP 47 [[BCP47]], a mapping from the actual value of the metadata language is needed.

    Topic category, originating controlled vocabulary, and keyword value - *Dataset topic category

    In INSPIRE, these two elements have specific purposes. Quoting from the INSPIRE Metadata Regulation [[?INSPIRE-MD-REG]] (§2.1 and §3.1, respectively):

    • The topic category is a high-level classification scheme to assist in the grouping and topic-based search of available spatial data resources.

    • The keyword value is a commonly used word, formalised word or phrase used to describe the subject. While the topic category is too coarse for detailed queries, keywords help narrowing a full text search and they allow for structured keyword search.

    Moreover, two types of keywords are allowed:

    • free keywords;

    • keywords taken from a controlled vocabulary.

    Finally, topic categories apply only to datasets and dataset series.

    Topic category and keyword in datasets and dataset series

    As far as dataset metadata are concerned, in both [[VOCAB-DCAT-3]] and [[DCAT-AP-3]], a distinction is made only between free keywords and keywords from controlled vocabularies, associated with a URI. For the former, dcat:keyword is used, whereas for the latter dcat:theme (which is a sub-property of dct:subject). Since the INSPIRE Registry operates URI registers for topic categories and INSPIRE spatial data themes, and in order to keep the distinction existing in INSPIRE between topic categories and keywords, the mapping is as follows:

    • Topic category is mapped to geodcatap:topicCategory, and expressed by the corresponding URIs minted for the ISO code list in the INSPIRE Registry – reference register http://inspire.ec.europa.eu/metadata-codelist/TopicCategory;
    • Keywords not associated with a controlled vocabulary will be mapped to dcat:keyword;
    • INSPIRE spatial data themes are mapped to dcat:theme and expressed by the corresponding URI in the INSPIRE Registry – reference register http://inspire.ec.europa.eu/theme;
    • Keywords associated with other controlled vocabularies are mapped to dcat:theme.

    Following [[DCAT-AP-3]] recommendations, keywords from controlled vocabularies SHOULD be preferably specified with dereferenceable HTTP URIs. In such a case, the information concerning the originating controlled vocabulary can be omitted.

    When keywords cannot be specified with HTTP URIs, they SHOULD be typed as a skos:Concept associated with a skos:ConceptScheme (used to type the originating controlled vocabulary), and annotated with the textual content and reference date(s) in the relevant INSPIRE metadata elements.

    The representation of the information concerning the controlled vocabulary is illustrated in the following table.

    Metadata Element Proposed mapping
    Originating controlled vocabulary Title skos:ConceptScheme dct:title
    Reference date creation dct:created
    last revision dct:modified
    publication dct:issued

    For conformance with [[DCAT-AP-3]], GeoDCAT-AP records MUST also include keywords from the EU Vocabularies Data Theme Named Authority List [[EUV-THEMES]].

    In order to ensure consistency, the relevant EU Vocabularies Data Theme keywords SHOULD be selected based on mappings with the controlled vocabularies used in INSPIRE / ISO 19115 metadata.

    Keyword in services

    As far as service metadata are concerned, keywords can classify either a service or the datasets / series operated by the service itself. For the latter, INSPIRE Metadata Regulation requires using at least one of the keywords from the ISO 19119 code list of spatial data service categories.

    In order to keep the distinction between these two types of keywords, the adopted solution is as follows:

    • Keywords from the ISO 19119 codelist of spatial data service types mapped to geodcatap:serviceType, and expressed by the corresponding URI in the INSPIRE Registry – reference register http://inspire.ec.europa.eu/metadata-codelist/SpatialDataServiceType;
    • Keywords from the ISO 19119 codelist of spatial data service categories are mapped to geodcatap:serviceCategory, and expressed by the corresponding URI in the INSPIRE Registry – reference register http://inspire.ec.europa.eu/metadata-codelist/SpatialDataServiceCategory;
    • Keywords not associated with a controlled vocabulary will be mapped to dcat:keyword, and represented as un-typed literals;
    • INSPIRE spatial data themes are mapped to dcat:theme, and expressed by the corresponding URI in the INSPIRE Registry – reference register http://inspire.ec.europa.eu/theme
    • Keywords associated with other controlled vocabularies are mapped to dcat:theme. If not denoted by an HTTP URI, they SHOULD be expressed as a skos:Concept associated with a skos:ConceptScheme, and annotated with the textual content and reference date(s) in the relevant INSPIRE metadata elements.

    Spatial data service type - *not in ISO 19115 core

    See on resource type.

    Geographic bounding box - *Geographic location of the dataset (by 4 coordinates or by geographic identifier)

    In the core profile of [[ISO-19115]], spatial coverage can be specified either with a bounding box (a geometry) or a geographic identifier. INSPIRE is more restrictive, in that it requires using a bounding box

    Based on that, GeoDCAT-AP specified spatial coverage as illustrated in the following sections.

    Bounding box

    As a general rule, when the area corresponding to the spatial coverage is denoted by a geometry, as in INSPIRE, [[DCAT-AP-3]] recommends the use of the Core Location Vocabulary [[LOCN]], where this is done by using property locn:geometry, having as range a geometry specified as

    • a URI - e.g., by using the geo URI scheme (IET RFC-5870) [[?RFC5870]], or a geohash URI [[?GEOHASH]], [[?GEOHASH-36]];

    • a syntax encoding scheme - e.g., geohashes [[?GEOHASH]], [[?GEOHASH-36]], WKT [[?ISO-19125-1]], GML [[?GML]], KML [[?KML]], GeoJSON [[?RFC7946]]; or

    • a semantic representation - using vocabularies like W3C Lat/long [[?W3C-BASIC-GEO]] or schema.org [[?SCHEMA-ORG]].

    However, in case the geometry is a bounding box or a centroid, properties dcat:bbox and dcat:centroid, respectively, SHOULD be used instead of locn:geometry.

    It is worth noting that currently there is no agreement on a preferred format to be used in RDF for the representation of geometries. In GeoDCAT-AP, geometries can be provided in any, and possibly multiple, encodings, but at least one of the following must be made available: WKT or GML. An additional requirement concerns the coordinate reference system (CRS) used, which may vary on a country or territory basis. The CRS must be specified in the GML or WKT encoding as required by GeoSPARQL [[GeoSPARQL11]]. Geometries shall be interpreted using the axis order defined in the spatial reference system used. For example, for CRS84 the axis order is longitude / latitude, whereas for WGS84 the axis order is latitude / longitude. Summarising:

    • Geometries MAY be provided in multiple encodings, but at least one of the following MUST be made available: GML and WKT.

    • For GML and WKT, the CRS MUST be specified as defined in GeoSPARQL [[GeoSPARQL11]].

    As geometries may be provided in multiple encodings, the corresponding datatype SHOULD be always specified to ensure that the geometry literal is correctly interpreted.

    For GML and WKT, the [[GeoSPARQL11]] datatypes gsp:gmlLiteral and gsp:wktLiteral, respectively, MUST be used.

    For GeoJSON [[?RFC7946]], datatype gsp:geoJSONLiteral, defined in GeoSPARQL, version 1.1 [[?GeoSPARQL11]], SHOULD be used.

    For the other geometry encodings, no datatype is currently available. Therefore, their interoperability is not ensured when metadata records are shared or harvested across catalogues.

    Geographic identifier

    [[ISO-19115]] core also allows specifying the geographic location using a geographic identifier. Following [[DCAT-AP-3]], for this, it is RECOMMENDED to use an HTTP URI from one of the following registers / gazetteers:

    • The Named Authority Lists operated by the Metadata Registry of the EU Publications office concerning continents [[EUV-CONT]], countries [[EUV-COUNTRIES]], and places [[EUV-PLACES]].

    If none of the above provides the relevant geographic identifiers, Geonames [[?GEONAMES]] SHOULD be used.

    If an HTTP URI is not available, the geographic identifier MUST be expressed with skos:prefLabel, and the reference to the originating controlled vocabulary (if any) MUST be specified with skos:inScheme. The controlled vocabulary will be described by a name (dct:title) and a last modified data (dct:modified).

    As far as geographic identifiers are concerned, following [[DCAT-AP-3]], GeoDCAT-AP does not prevent the use other vocabularies in addition to the recommended ones. The vocabularies identified by the GeoDCAT-AP WG are listed in .

    Temporal reference and metadata date –*Additional extent information for the dataset (vertical and temporal) and *Metadata date stamp

    Temporal reference is a composite element consisting of the following possible child elements:

    • temporal extent (temporal coverage);

    • date of publication, last revision, and/or creation.

    Based on [[DCAT-AP-3]], temporal extent is mapped to dct:temporal, having as range dct:PeriodOfTime. The time instant or interval is specified by using properties dcat:startDate and dcat:endDate, respectively.

    By contrast, date of publication, last revision, and creation are mapped, respectively, to dct:issued, dct:modified (both core and extended GeoDCAT-AP mapping profiles), and dct:created (only for the extended mapping profile of GeoDCAT-AP).

    [[DCAT-AP-3]] does not have a property equivalent to the INSPIRE metadata element metadata date. In INSPIRE, this element is defined as follows (see [[INSPIRE-MD-REG]], Part B, §10.2):

    The date which specifies when the metadata record was created or updated.

    Due to this ambiguity, the defined mapping for this element is dct:modified.

    Lineage - *Lineage

    Following [[DCAT-AP-3]], this element is mapped to property dct:provenance.

    Since the range of dct:provenance is not a literal, but class dct:ProvenanceStatement, the free-text content of element “lineage” can be expressed by using dct:description.

    Spatial resolution – Spatial resolution of the dataset

    [[VOCAB-DCAT-3]] and [[DCAT-AP-3]] provide property dcat:spatialResolutionInMeters, to specify spatial resolution as distance in metres. Morever, [[VOCAB-DCAT-3]] and [[?SDW-BP]] recommend the use of [[VOCAB-DQV]] to specify other types of spatial resolution, via property dqv:hasQualityMeasurement.

    Based on this, GeoDCAT-AP specifies spatial resolution as follows:

    • Property dcat:spatialResolutionInMeters is used for spatial resolution when it is expressed as distance in metres.
    • Property dqv:hasQualityMeasurement is used for all types of spatial resolution. In such a case, the type of spatial resolution is specified by using property dqv:isMeasurementOf, which takes as value the relevant instance of class dqv:Metric defined in GeoDCAT-AP for this purpose (see Instances of Metric).
    • Property geodcatap:spatialResolutionAsText is used when spatial resolution is specified as free-text.

    The core mapping profile of GeoDCAT-AP, following [[DCAT-AP-3]], supports only the use property dcat:spatialResolutionInMeters, and, therefore, the other types of spatial resolution are left unmapped.

    Conformity and data quality - *not in ISO 19115 core

    In [[ISO-19115]], conformance and quality information is encoded as a quality report containing the result of a test (an evaluation) of a given quality measure, according to an evaluation method, with either a quantitative result (a metric) or a conformance result (pass or fail) as most important outcome.

    The current version of GeoDCAT-AP only defines a syntax binding for conformity and not for data quality in general, making use of property dct:conformsTo and the W3C Provenance Ontology (PROV-O) [[PROV-O]], as explained in the following paragraphs.

    [[DCAT-AP-3]] provides a single candidate, dct:conformsTo, which however can be used to map only a conformity of degree ‘conformant’. This is suitable for the core mapping profile of GeoDCAT-AP.

    Considering how conformity must be expressed in extended mapping profile of GeoDCAT-AP (see [[INSPIRE-MD-REG]], Part B, §7), possible candidates are the W3C Evaluation and Report Language (EARL) [[?EARL10]] and the W3C Provenance Ontology (PROV-O) [[PROV-O]]. The latter candidate was chosen by the GeoDCAT-AP Working Group, since it would enable wider re-use with respect to the EARL vocabulary, which is more specific, and its use is limited.

    [[PROV-O]] allows encoding conformity as a test activity (prov:Activity) that generated a result specified with property prov:generated, corresponding to the degree of conformity, for which the INSPIRE Registry maintains a URI set [[INSPIRE-DoC]]. The specification against which the conformance is asserted is specified via a qualified association (prov:qualifiedAssociation) with a test plan (a prov:Plan) in turn derived from a standard (dct:Standard, also prov:Entity). These associations are made via a property chain: prov:qualifiedAssociation, prov:hadPlan, and prov:wasDerivedFrom.

    This pattern is illustrated in the following table.

    Metadata element Proposed mapping
    Conformity Specification (M) Title prov:wasUsedBy (range prov:Activity) prov:qualifiedAssociation (range prov:Assocation) > prov:hadPlan (range prov:Plan) > prov:wasDerivedFrom (range: prov:Entity, dct:Standard) dct:title
    Reference date creation dct:created
    last revision dct:modified
    publication dct:issued
    Degree (M) prov:generated (range prov:Entity) dct:type (range [[INSPIRE-DoC]])
    dct:description

    In order to grant interoperability with [[DCAT-AP-3]], when conformity is of degree “conformant”, the proposal is to use both [[PROV-O]] and dct:conformsTo for GeoDCAT-AP Extended.

    Conditions for access and use and limitations on public access – Use limitation and access / other constraints

    In [[DCAT-AP-3]], licensing information is specified on (a) data catalogues (services) and on (b) the distribution(s) of a dataset, and not on the dataset itself. The principle is that different dataset distributions may be associated with different licensing terms. Moreover, [[DCAT-AP-3]] recommends the use of dct:accessRights for specifying access conditions. Both licenses and access rights should be indicated by their corresponding URIs.

    Based on this, GeoDCAT-AP specifies use and access limitations by using, respectively, dct:license and dct:accessRights whenever the value is available as a URI. Otherwise, since the range of these properties is not a literal, but, respectively, classes dct:LicenseDocument and dct:RightsStatement, the free-text content of the corresponding ISO 19115 / INSPIRE metadata elements can be expressed using dct:description on the dct:RightsStatement instance, connected using the dct:rights property.

    Responsible party and metadata point of contact - *Dataset responsible party and *Metadata point of contact

    [[DCAT-AP-3]] supports properties to denote the publisher, the creator, and the contact point for a dataset.

    By contrast, [[ISO-19115]] and [[INSPIRE-MD-REG]] support 11 possible relationships between a resource (a dataset, a dataset series, a service) and an agent (organisation), plus one for metadata. However, for only some of them suitable candidates exist from widely used vocabularies (in particular, DCMI Metadata Terms [[DCTERMS]]).

    In order to fill this gap, specific properties have been defined in the GeoDCAT-AP namespace to complement those available in [[DCAT-AP-3]] and [[DCTERMS]].

    The following table lists the mappings between responsible party roles and the corresponding properties used in GeoDCAT-AP.

    [[ISO-19115]] [[INSPIRE-MD-REG]] Description Proposed RDF mapping
    Resource provider Part B, §6.1 Party that supplies the resource. geodcatap:resourceProvider
    Custodian Part B, §6.2 Party that accepts accountability and responsibility for the data and ensures appropriate care and maintenance of the resource. geodcatap:custodian
    Owner Part B, §6.3 Party that owns the resource. dct:rightsHolder
    User Part B, §6.4 Party who uses the resource. geodcatap:user
    Distributor Part B, §6.5 Party who distributes the resource geodcatap:distributor
    Originator Part B, §6.6 Party who created the resource. geodcatap:originator
    Point of contact Part B, §6.7 Party who can be contacted for acquiring knowledge about or acquisition of the resource. dcat:contactPoint
    Principal investigator Part B, §6.8 Key party responsible for gathering information and conducting research geodcatap:principalInvestigator
    Processor Part B, §6.9 Party who has processed the data in a manner such that the resource has been modified. geodcatap:processor
    Publisher Part B, §6.10 Party who published the resource dct:publisher
    Author Part B, §6.11 Party who authored the resource. dct:creator

    The extended mapping profile of GeoDCAT-AP also supports the use of the W3C PROV ontology [[PROV-O]] and [[VOCAB-DCAT-3]] to specify the relationship between the resource and the responsible organisation. The FOAF Vocabulary [[FOAF]] is used to specify the contact information concerning the responsible party. Finally, the responsible party role will be specified by using dcat:hadRole, and using the relevant code list values from the INSPIRE Registry – reference register [[INSPIRE-RPR]]:

    http://inspire.ec.europa.eu/metadata-codelist/ResponsiblePartyRole

    These mappings are illustrated in the following table.

    Metadata element Proposed mapping
    Responsible party Responsible party Organisation name prov:qualifiedAttribution (range prov:Attribution) prov:agent (range prov:Agent, foaf:Agent) foaf:name
    Contact email address foaf:mbox
    Responsible party role dcat:hadRole (range dcat:Role)

    It is important to note that the [[PROV-O]]-based mappings are semantically equivalent to the property-based ones illustrated earlier in this section. Their use is therefore only accessory, and functional to possible requirements from the data provider side.

    For these reasons, the GeoDCAT-AP overall approach is as follows:

    • Responsible parties and their roles MUST be represented by the corresponding properties, based on an agreed definition of 1-to-1 mappings.
    • The property-based representation MAY be complemented with the [[PROV-O]]-based approach.

    As mentioned earlier, the latter option is supported only in the extended mapping profile of GeoDCAT-AP.

    *Metadata file identifier

    This element identifies a metadata record.

    Metadata file identifiers are mapped to dct:identifier.

    If the metadata file identifier is or can be encoded as an HTTP URI, it can also be used as the URI of the catalogue record (see ).

    *Metadata standard name, *Metadata standard version

    Following [[DCAT-AP-3]], GeoDCAT-AP uses dct:conformsTo to specify the metadata standard, and properties dct:title and owl:versionInfo are used to specify the standard name and version, respectively.

    This pattern is illustrated in the following table.

    Metadata element Proposed mapping
    Metadata standard Metadata standard name dct:conformsTo (range dct:Standard) dct:title
    Metadata standard version owl:versionInfo

    shows a GeoDCAT-AP metadata record obtained from one conformant with [[ISO-19115]].

    To represent the standard name and version of the source ISO record, the GeoDCAT-AP metadata record must be extended as in .

    *Metadata characterset

    Since in RDF serializations always use UTF-8, the metadata characterset is not reflected in the GeoDCAT-AP.

    Metadata point of contact - *Metadata point of contact

    See .

    Metadata date - *Metadata date stamp

    See .

    Metadata language - *Metadata language

    See .

    Coordinate reference systems and Temporal reference systems – *Reference System

    In GeoDCAT-AP, these elements are mapped to property geodcatap:referenceSystem. Moreover, in order to indicate which type of a reference system the object of geodcatap:referenceSystem denotes, an additional statement with predicate dct:type is added, with a code list value defining the notion of (spatial / temporal) reference system, taken from the glossary operated by the INSPIRE Registry [[INSPIRE-GLOSSARY]].

    More precisely, the following URIs SHOULD be used to denote, respectively, spatial and temporal reference systems:

    The reference system identifier SHOULD be preferably represented with an HTTP URI. In particular, spatial reference systems should be specified by using the corresponding URIs from the “EPSG coordinate reference systems” register operated by the Open Geospatial Consortium [[OGC-EPSG]].

    In this register, the URI prefix for coordinate reference systems is the following one:

    http://www.opengis.net/def/crs/EPSG/0/

    followed by the number identifying the coordinate reference system in the EPSG register. For instance, the following URI

    http://www.opengis.net/def/crs/EPSG/0/4258

    identifies coordinate reference system EPSG 4258, corresponding to ETRS89 (European Terrestrial Reference System 1989).

    In case the reference system is not specified as an HTTP URI, the mapping covers also other information included in the source metadata - as the identifier (dct:identifier), name (dct:title), and version (owl:versionInfo), plus a reference to the relevant register, if available (skos:inScheme). If a reference register is available, the reference system is implicitly also a skos:Concept, and its name can be specified by using skos:prefLabel.

    If not represented with an HTTP URI, the reference system identifier MUST be mapped to dct:identifier, as in .

    Character encoding - *Dataset character set and *Metadata character set

    In [[VOCAB-DCAT-3]] and [[DCAT-AP-3]], the specification of the character encoding of a dataset and the character encoding of a metadata record is not explicitly supported. Moreover, since GeoDCAT-AP is an RDF-based specification, the metadata represented using GeoDCAT-AP are always in the UTF-8 encoding.

    According to [[?RFC4288]], the character set can be part of the media type specification, but only for type “text”. By contrast, in INSPIRE the character set can be specified also for other media types.

    The W3C Content vocabulary [[Content-in-RDF10]] provides a possibly suitable candidate, namely, property cnt:characterEncoding, taking as value the character set names in the IANA register [[IANA-CHARSETS]]. GeoDCAT-AP uses this property.

    Character encoding in [[ISO-19115]] metadata is specified with a code list that can be mapped to the corresponding codes in [[IANA-CHARSETS]], as shown in the following table (entries with 1-to-many mappings are in italic).

    ISO 19115 - MD_CharacterSetCode Description IANA
    ucs2 16-bit fixed size Universal Character Set, based on ISO/IEC 10646 ISO-10646-UCS-2
    ucs4 32-bit fixed size Universal Character Set, based on ISO/IEC 10646 ISO-10646-UCS-4
    utf7 7-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF-7
    utf8 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF-8
    utf16 16-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF-16
    8859part1 ISO/IEC 8859-1, Information technology - 8-bit single byte coded graphic character sets - Part 1 : Latin alphabet No.1 ISO-8859-1
    8859part2 ISO/IEC 8859-2, Information technology - 8-bit single byte coded graphic character sets - Part 2 : Latin alphabet No.2 ISO-8859-2
    8859part3 ISO/IEC 8859-3, Information technology - 8-bit single byte coded graphic character sets - Part 3 : Latin alphabet No.3 ISO-8859-3
    8859part4 ISO/IEC 8859-4, Information technology - 8-bit single byte coded graphic character sets - Part 4 : Latin alphabet No.4 ISO-8859-4
    8859part5 ISO/IEC 8859-5, Information technology - 8-bit single byte coded graphic character sets - Part 5 : Latin/Cyrillic alphabet ISO-8859-5
    8859part6 ISO/IEC 8859-6, Information technology - 8-bit single byte coded graphic character sets - Part 6 : Latin/Arabic alphabet ISO-8859-6
    8859part7 ISO/IEC 8859-7, Information technology - 8-bit single byte coded graphic character sets - Part 7 : Latin/Greek alphabet ISO-8859-7
    8859part8 ISO/IEC 8859-8, Information technology - 8-bit single byte coded graphic character sets - Part 8 : Latin/Hebrew alphabet ISO-8859-8
    8859part9 ISO/IEC 8859-9, Information technology - 8-bit single byte coded graphic character sets - Part 9 : Latin alphabet No.5 ISO-8859-9
    8859part10 ISO/IEC 8859-10, Information technology - 8-bit single byte coded graphic character sets - Part 10 : Latin alphabet No.6 ISO-8859-10
    8859part11 ISO/IEC 8859-11, Information technology - 8-bit single byte coded graphic character sets - Part 11 : Latin/Thai alphabet ISO-8859-11
    8859part13 ISO/IEC 8859-13, Information technology - 8-bit single byte coded graphic character sets - Part 13 : Latin alphabet No.7 ISO-8859-13
    8859part14 ISO/IEC 8859-14, Information technology - 8-bit single byte coded graphic character sets - Part 14 : Latin alphabet No.8 (Celtic) ISO-8859-14
    8859part15 ISO/IEC 8859-15, Information technology - 8-bit single byte coded graphic character sets - Part 15 : Latin alphabet No.9 ISO-8859-15
    8859part16 ISO/IEC 8859-16, Information technology - 8-bit single byte coded graphic character sets - Part 16 : Latin alphabet No.10 ISO-8859-16
    jis japanese code set used for electronic transmission JIS_Encoding
    shiftJIS japanese code set used on MS-DOS machines Shift_JIS
    eucJP japanese code set used on UNIX based machines EUC-JP
    usAscii United States ASCII code set (ISO 646 US) US-ASCII
    ebcdic IBM mainframe code set IBM037
    eucKR Korean code set EUC-KR
    big5 traditional Chinese code set used in Taiwan, Hong Kong of China and other areas Big5
    GB2312 simplified Chinese code set GB2312

    Encoding - *Distribution format

    In both [[VOCAB-DCAT-3]] and [[DCAT-AP-3]], this information is specified for the distribution(s) of a dataset, and not for the dataset itself.

    Two properties are available:

    • dcat:mediaType: to be used when the format corresponds to one of the media types registered by IANA [[IANA-MEDIA-TYPES]].

    • dct:format: to be used in all the other cases, to be used with file type register operated by the Publications Office of the EU [[EUV-FT]].

    The same approach is used in GeoDCAT-AP for ISO 19115 / INSPIRE metadata.

    Spatial representation type – *Spatial representation type

    In [[DCAT-AP-3]], no equivalent term is provided.

    In [[ISO-19115]], element “Spatial representation type” is meant mainly to describe the “method used to represent geographic information in the dataset”, by using a code list (see the table below).

    The ADMS vocabulary [[VOCAB-ADMS]] includes a property, namely, adms:representationTechnique that could be used for this purpose. It is worth noting that, in the ADMS specification, adms:representationTechnique decribes a distribution, and not the dataset. Moreover, the [[ISO-19115]] code list of spatial representation types is available as a URI register from the INSPIRE Registry [[INSPIRE-SRT]].

    Based on this, GeoDCAT-AP specifies this information by using property adms:representationTechnique, with the spatial representation type URIs operated by the INSPIRE Registry [[INSPIRE-SRT]].

    This mapping is supported only in the extended mapping profile of GeoDCAT-AP.

    The spatial representation types defined in [[ISO-19115]] are listed in the following table. It is important to note that, as stated in the INSPIRE Data Specifications, the only spatial representation types in scope of INSPIRE are the following ones: “vector”, “grid”, and “tin”.

    ISO 19115 - MD_SpatialRepresentionTypeCode Description In scope of INSPIRE?
    vector vector data is used to represent geographic data Yes
    grid grid data is used to represent geographic data Yes
    textTable textual or tabular data is used to represent geographic data No
    tin triangulated irregular network Yes
    stereoModel three-dimensional view formed by the intersecting homologous rays of an overlapping pair of images No
    video scene from a video recording No

    Maintenance information - *not in ISO 19115 core

    In [[ISO-19115]], element “Maintenance information” is meant mainly to describe how frequently a resource is updated.

    In [[DCAT-AP-3]], the update frequency is expressed through dct:accrualPeriodicity, with the frequency codes defined in the the EU Vocabularies Frequency Named Authority List [[EUV-FREQ]], which can be partially mapped to the ones used in [[ISO-19115]], as shown in the following table.

    ISO 19115 - MD_MaintenanceFrequencyCode Dublin Core Collection Description Frequency Vocabulary [[?CLD-FREQ]] EU Vocabularies Frequency Named Authority List [[EUV-FREQ]]
    continual continuous UPDATE_CONT / CONT
    daily daily DAILY
    weekly weekly WEEKLY
    fortnightly biweekly BIWEEKLY
    monthly monthly MONTHLY
    quarterly quarterly QUARTERLY
    biannually semiannual ANNUAL_2
    annually annual ANNUAL
    asNeeded - AS_NEEDED
    Irregular irregular IRREG
    notPlanned - NOT_PLANNED
    unknown - UNKNOWN
    - triennial TRIENNIAL
    - biennial BIENNIAL
    - threeTimesAYear ANNUAL_3
    - bimonthly BIMONTHLY
    - semimonthly MONTHLY_2
    - threeTimesAMonth MONTHLY_3
    - semiweekly WEEKLY_2
    - threeTimesAWeek WEEKLY_3
    - - OTHER

    The [[ISO-19115]] code list of maintenance frequency codes is available as a URI register from the INSPIRE Registry [[INSPIRE-MF]].

    Based on this, maintenance frequency is specified in GeoDCAT-AP by using dct:accrualPeriodicity with the EU Vocabularies Frequency Named Authority List [[EUV-FREQ]].

    For the frequency codes not covered by the EU Vocabularies Frequency code list, the approach will be as follows:

    • In the core mapping profile of GeoDCAT-AP these codes will be ignored.

    • The extended mapping profile of GeoDCAT-AP will use the code list of ISO maintenance frequency codes operated by the INSPIRE Registry [[INSPIRE-MF]].

    Comparison between INSPIRE and ISO 19115-1:2014

    In [[?ISO-19115-1]] the concept of ‘Core metadata’ was removed; it was translated into a normative annex (Annex F) “Discovery metadata for geographic resources”. In the Annex F metadata elements for the discovery are listed in 2 tables:

    Spatial dataset and spatial dataset series

    The table below compares the core requirements of ISO 19115:2003 (see Table 3 in 6.5 of [[?ISO-19115]]), the requirements of INSPIRE for spatial dataset and spatial dataset series as defined in the Implementing Rules for metadata and the discovery metadata for geographic datasets and series (see Table F.1 in annex F of [[?ISO-19115-1]]). For those last metadata elements in the last field of the table the path is indicated. For each element, in brackets the obligation/max occurrence (3rd field).

    ISO 19115 Core INSPIRE Implementing Rules for Metadata ISO 19115-1:2014 Discovery metadata for datasets and series (Table F.1) ISO 19115-1:2014 Path
    Dataset title (M) Part B 1.1 Resource Title Resource title (M/1) MD_Metadata.identificationInfo > MD_DataIdentification.citation > CI_Citation.title
    Dataset reference date (M) Part B 5 Temporal Reference Resource reference date (O/N) MD_Metadata.idenitificationInfo > MD_DataIdentification.citation > CI_Citation.date
    Dataset responsible party (O) Part B 9 Responsible organisation Resource point of contact (O/N) MD_Metadata.identificationInfo > MD_DataIdentification.pointOf-Contact > CI_Responsibility
    Geographic location of the dataset (C) Part B 4.1 Geographic Bounding Box Geographic location (C/N) MD_Metadata.identificationInfo > MD_DataIdentification.extent > EX_Extent.geographicElement > EX_GeographicExtent > EX_GeographicBoundingBox -or- EX_GeographicDescription)
    Dataset language (M) Part B 1.7 Resource Language Resource language (C/N) MD_Metadata.identificationInfo > MD_DataIdentification.defaultLocale > PT_Locale
    Dataset character set (C) - -
    Dataset topic category (M) Part B 2.1 Topic Category Resource topic category (C/N) MD_Metadata.identificationInfo > MD_DataIdentification.topicCategory > MD_TopicCategoryCode
    Spatial resolution of the dataset (O) Part B 6.2 Spatial Resolution Spatial resolution (O/N)

    MD_Metadata.identificationInfo > MD_Identification.spatialResolution > MD_Resolution.equivalentScale MD_Resolution.distance, MD_Resolution.vertical, or MD_Resolution.angularDistance, or MD_Resolution.levelOfDetail

    Abstract describing the dataset (M) Part B 1.2 Resource abstract Resource abstract (M/1) MD_Metadata.identificationInfo > MD_DataIdentification.abstract
    Distribution format (O) - -
    Additional extent information for the dataset (vertical and temporal) (O) Part B 5.1 Temporal extent Extent information for the dataset (additional) (O/N) MD_Metadata.identificationInfo > MD_Identification.extent > EX_Extent > EX_TemporalExtent or EX_VerticalExtent
    Spatial representation type (O) - -
    Reference system (O) - -
    Lineage (O) Part B 6.1 Lineage Resource lineage (O/N) MD_Metadata > resourceLineage > LI_Lineage.statement
    On-line resource (O) Part B 1.4 Resource Locator Resource on-line Link (O/N) MD_Metadata.identificationInfo > MD_DataIdentification.citation > CI_Citation.onlineResource > CI_OnlineResource
    Metadata file identifier (O) - Metadata reference information (O/1) MD_Metadata.metadataIdentifier
    Metadata standard name (O) - -
    Metadata standard version (O) - -
    Metadata language (C) Part B 10.3 Metadata Language - MD_Metadata.defaultLocale > PT_Locale.language
    Metadata character set (C) - -
    Metadata point of contact (M) Part B 10.1 Metadata point of contact Metadata point of contact (M/N) MD_Metadata.contact > CI_Responsibility
    Metadata date stamp (M) Part B 10.2 Metadata Date Metadata date stamp (M/N) MD_Metadata.dateInfo
    - Part B 1.3 Resource Type Resource type (C/1) MD_Metadata.metadataScope > MD_Scope.resourceScope
    Part B 1.5 Unique Resource Identifier Resource identifier (O/N) MD_Metadata.identificationInfo > MD_DataIdentification.citation > CI_Citation.identifier > MD_Identifier
    Part B 3 Keyword Keywords (O/N) MD_Metadata.identificationInfo > MD_DataIdentification > descriptiveKeywords > MD_Keywords
    - Part B 7 Conformity - MD_Metadata.dataQualityInfo > DQ_DataQuality.report > DQ_UsabilityElement.result > DQ_ConformanceResult
    - Part B 8.1 Conditions for access and use Constraints on resource access and use (O/N) MD_Metadata.identificationInfo > MD_DataIdentification > MD_Constraints.useLimitations
    - Part B 8.2 Limitations on public access Constraints on resource access and use (O/N) MD_Metadata.identificationInfo > MD_DataIdentification > MD_LegalConstraints.accessConstraint and/or MD_LegalConstraints.otherConstraint and/or MD_SecurityConstraints.classification

    Services

    The table below compares the core requirements of ISO 19115:2003 (see Table 3 in 6.5 of ISO 19115:2003), the requirements of INSPIRE for services as defined in the Implementing Rules for metadata and the discovery metadata for services (see Table F.2 in annex F of ISO 19115-1:2014). For those metadata elements in the last field of the table the path is indicated. For each element, in brackets the obligation/max occurrence (3rd field).

    ISO 19115 Core INSPIRE ISO 19115-1:2014 Discovery metadata for services (Table F.2) Path ISO 19115-1:2014
    Dataset title (M) Part B 1.1 Resource Title Service title (M/1) MD_Metadata.identificationInfo > SV_ServiceIdentification.citation > CI_Citation.title
    Dataset reference date (M) Part B 5 Temporal Reference Reference date (O/1) MD_Metadata.identificationInfo > SV_ServiceIdentification.citation > CI_Citation.date
    Dataset responsible party (O) Part B 9 Responsible organisation Responsible party (O/N) MD_Metadata.identificationInfo > SV_ServiceIdentification.pointOfContact > CI_Responsibility
    Geographic location of the dataset (C) - Geographic location (M/1) MD_Metadata.identificationInfo > SV_ServiceIdentification.extent > EX_Extent.geographicElement > EX_GeographicExtent > EX_GeographicBoundingBox -or- EX_GeographicDescription
    - Part B 4.1 Geographic Bounding Box -
    Dataset language (M) - -
    Dataset character set (C) - -
    Dataset topic category (M) - Service topic category (O/N) MD_Metadata.identificationInfo > SV_ServiceIdentification.topicCategory > MD_TopicCategoryCode
    Spatial resolution of the dataset (O) Part B 6.2 Spatial Resolution -
    Abstract describing the dataset (M) Part B 1.2 Resource abstract Resource abstract (M/1) MD_Metadata.identificationInfo > SV_ServiceIdentification.abstract
    Distribution format (O) - -
    Additional extent information for the dataset (O) - -
    Spatial representation type (O) - -
    Reference system (O) - -
    Lineage (O) - -
    On-line resource (O) Part B 1.4 Resource Locator On-line Link (O/N) MD_Metadata.identificationInfo > SV_ServiceIdentification.citation > CI_Citation.onlineResource > CI_OnlineResource
    Metadata file identifier (O) - Metadata reference information (O/1) MD_Metadata.metadataIdentifier
    Metadata standard name (O) - -
    Metadata standard version (O) - -
    Metadata language (C) Part B 10.3 Metadata Language - MD_Metadata.defaultLocale > PT_Locale.language
    Metadata character set (C) - -
    Metadata point of contact (M) Part B 10.1 Metadata point of contact Metadata point of contact (M/N) MD_Metadata.contact > CI_Responsibility
    Metadata date stamp (M) Part B 10.2 Metadata Date Metadata date stamp (M/N) MD_Metadata.dateInfo
    - Part B 1.3 Resource Type Resource type (M/1) MD_Metadata.metadataScope > MD_Scope.resourceScope
    - Part B 1.6 Coupled Resource Coupled Resource (C/N) MD_Metadata > SV_ServiceIdentification.coupledResource > SV_CoupledResource
    - Part B 2.2 Spatial Data Service Type -
    Part B 3 Keyword Keywords (O/N) MD_Metadata.identificationInfo > SV_ServiceIdentification > MD_Keywords
    - Part B 7 Conformity - MD_Metadata.dataQualityInfo > DQ_DataQuality.report > DQ_UsabilityElement.result > DQ_ConformanceResult
    - Part B 8.1 Conditions for access and use Constraints on access and use (O/N) MD_Metadata.identificationInfo > MD_DataIdentification > MD_Constraints.useLimitations
    - Part B 8.2 Limitations on public access Constraints on access and use (O/N) MD_Metadata.identificationInfo > MD_DataIdentification > MD_LegalConstraints.accessConstraint and/or MD_LegalConstraints.otherConstraint and/or MD_SecurityConstraints.classification
    - - Coupled resource type (C/1) MD_Metadata > SV_ServiceIdentification.couplingType > SV_CouplingType
    - - Resource identifier (O/N) MD_Metadata.identificationInfo > SV_ServiceIdentification.citation > CI_Citation.identifier > MD_Identifier

    Quick Reference of Classes and Properties

    This section provides a condensed tabular overview of the mentioned classes and properties in this specification. The properties are grouped under headings mandatory, recommended, optional and deprecated. These terms have the following meaning.
    ClassClass IRIProperty TypePropertyProperty IRI
    Activity
    http://www.w3.org/ns/prov#Activity
    Optional generated
    http://www.w3.org/ns/prov#generated
    Activity
    http://www.w3.org/ns/prov#Activity
    Optional qualified association
    http://www.w3.org/ns/prov#qualifiedAssociation
    Activity
    http://www.w3.org/ns/prov#Activity
    Optional used
    http://www.w3.org/ns/prov#used
    Address (Core Location)
    http://www.w3.org/ns/locn#Address
    Optional administrative area
    http://www.w3.org/ns/locn#adminUnitL2
    Address (Core Location)
    http://www.w3.org/ns/locn#Address
    Optional city
    http://www.w3.org/ns/locn#postName
    Address (Core Location)
    http://www.w3.org/ns/locn#Address
    Optional country
    http://www.w3.org/ns/locn#adminUnitL2
    Address (Core Location)
    http://www.w3.org/ns/locn#Address
    Optional post code
    http://www.w3.org/ns/locn#postCode
    Address (Core Location)
    http://www.w3.org/ns/locn#Address
    Optional street address
    http://www.w3.org/ns/locn#thoroughfare
    Address (vCard)
    http://www.w3.org/2006/vcard/ns#Address
    Optional administrative area
    http://www.w3.org/2006/vcard/ns#region
    Address (vCard)
    http://www.w3.org/2006/vcard/ns#Address
    Optional city
    http://www.w3.org/2006/vcard/ns#locality
    Address (vCard)
    http://www.w3.org/2006/vcard/ns#Address
    Optional country
    http://www.w3.org/2006/vcard/ns#country-name
    Address (vCard)
    http://www.w3.org/2006/vcard/ns#Address
    Optional postal code
    http://www.w3.org/2006/vcard/ns#postal-code
    Address (vCard)
    http://www.w3.org/2006/vcard/ns#Address
    Optional street address
    http://www.w3.org/2006/vcard/ns#street-address
    Agent
    http://xmlns.com/foaf/0.1/Agent
    Mandatory name
    http://xmlns.com/foaf/0.1/name
    Agent
    http://xmlns.com/foaf/0.1/Agent
    Recommended type
    http://purl.org/dc/terms/type
    Agent
    http://xmlns.com/foaf/0.1/Agent
    Optional address
    http://www.w3.org/ns/locn#address
    Agent
    http://xmlns.com/foaf/0.1/Agent
    Optional affiliation
    http://www.w3.org/ns/org#memberOf
    Agent
    http://xmlns.com/foaf/0.1/Agent
    Optional email
    http://xmlns.com/foaf/0.1/mbox
    Agent
    http://xmlns.com/foaf/0.1/Agent
    Optional phone
    http://xmlns.com/foaf/0.1/phone
    Agent
    http://xmlns.com/foaf/0.1/Agent
    Optional URL
    http://xmlns.com/foaf/0.1/workplaceHomepage
    Association
    http://www.w3.org/ns/prov#Association
    Attribution
    http://www.w3.org/ns/prov#Attribution
    Optional agent
    http://www.w3.org/ns/prov#agent
    Attribution
    http://www.w3.org/ns/prov#Attribution
    Optional had role
    http://www.w3.org/ns/dcat#hadRole
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Mandatory description
    http://purl.org/dc/terms/description
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Mandatory publisher
    http://purl.org/dc/terms/publisher
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Mandatory title
    http://purl.org/dc/terms/title
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended dataset
    http://www.w3.org/ns/dcat#dataset
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended geographical coverage
    http://purl.org/dc/terms/spatial
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended homepage
    http://xmlns.com/foaf/0.1/homepage
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended language
    http://purl.org/dc/terms/language
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended licence
    http://purl.org/dc/terms/license
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended modification date
    http://purl.org/dc/terms/modified
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended release date
    http://purl.org/dc/terms/issued
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended service
    http://www.w3.org/ns/dcat#service
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Recommended themes
    http://www.w3.org/ns/dcat#themeTaxonomy
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional access rights
    http://purl.org/dc/terms/accessRights
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional applicable legislation
    http://data.europa.eu/r5r/applicableLegislation
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional catalogue
    http://www.w3.org/ns/dcat#catalog
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional conforms to
    http://purl.org/dc/terms/conformsTo
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional contact point
    http://www.w3.org/ns/dcat#contactPoint
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional creation date
    http://purl.org/dc/terms/created
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional creator
    http://purl.org/dc/terms/creator
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional custodian
    http://data.europa.eu/930/custodian
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional distributor
    http://data.europa.eu/930/distributor
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional has part
    http://purl.org/dc/terms/hasPart
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional identifier
    http://purl.org/dc/terms/identifier
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional keyword
    http://www.w3.org/ns/dcat#keyword
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional originator
    http://data.europa.eu/930/originator
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional principal investigator
    http://data.europa.eu/930/principalInvestigator
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional processor
    http://data.europa.eu/930/processor
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional qualified attribution
    http://www.w3.org/ns/prov#qualifiedAttribution
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional record
    http://www.w3.org/ns/dcat#record
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional reference system
    http://data.europa.eu/930/referenceSystem
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional resource provider
    http://data.europa.eu/930/resourceProvider
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional rights
    http://purl.org/dc/terms/rights
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional rights holder
    http://purl.org/dc/terms/rightsHolder
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional temporal coverage
    http://purl.org/dc/terms/temporal
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional theme
    http://www.w3.org/ns/dcat#theme
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional topic category
    http://data.europa.eu/930/topicCategory
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional user
    http://data.europa.eu/930/user
    Catalogue
    http://www.w3.org/ns/dcat#Catalog
    Optional was used by
    http://www.w3.org/ns/prov#wasUsedBy
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Mandatory modification date
    http://purl.org/dc/terms/modified
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Mandatory primary topic
    http://xmlns.com/foaf/0.1/primaryTopic
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Recommended application profile
    http://purl.org/dc/terms/conformsTo
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Recommended change type
    http://www.w3.org/ns/adms#status
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Recommended listing date
    http://purl.org/dc/terms/issued
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional contact point
    http://www.w3.org/ns/dcat#contactPoint
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional creation date
    http://purl.org/dc/terms/created
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional creator
    http://purl.org/dc/terms/creator
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional custodian
    http://data.europa.eu/930/custodian
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional description
    http://purl.org/dc/terms/description
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional distributor
    http://data.europa.eu/930/distributor
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional identifier
    http://purl.org/dc/terms/identifier
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional language
    http://purl.org/dc/terms/language
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional originator
    http://data.europa.eu/930/originator
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional principal investigator
    http://data.europa.eu/930/principalInvestigator
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional processor
    http://data.europa.eu/930/processor
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional publisher
    http://purl.org/dc/terms/publisher
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional qualified attribution
    http://www.w3.org/ns/prov#qualifiedAttribution
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional resource provider
    http://data.europa.eu/930/resourceProvider
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional rights holder
    http://purl.org/dc/terms/rightsHolder
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional source metadata
    http://purl.org/dc/terms/source
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional title
    http://purl.org/dc/terms/title
    Catalogue Record
    http://www.w3.org/ns/dcat#CatalogRecord
    Optional user
    http://data.europa.eu/930/user
    Catalogued Resource
    http://www.w3.org/ns/dcat#Resource
    Checksum
    http://spdx.org/rdf/terms#Checksum
    Mandatory algorithm
    http://spdx.org/rdf/terms#algorithm
    Checksum
    http://spdx.org/rdf/terms#Checksum
    Mandatory checksum value
    http://spdx.org/rdf/terms#checksumValue
    Checksum Algorithm
    http://spdx.org/rdf/terms#ChecksumAlgorithm
    Concept
    http://www.w3.org/2004/02/skos/core#Concept
    Mandatory preferred label
    http://www.w3.org/2004/02/skos/core#prefLabel
    Concept
    http://www.w3.org/2004/02/skos/core#Concept
    Optional category scheme
    http://www.w3.org/2004/02/skos/core#inScheme
    Concept Scheme
    http://www.w3.org/2004/02/skos/core#ConceptScheme
    Mandatory title
    http://purl.org/dc/terms/title
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Mandatory endpoint URL
    http://www.w3.org/ns/dcat#endpointURL
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Mandatory title
    http://purl.org/dc/terms/title
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Recommended conforms to
    http://purl.org/dc/terms/conformsTo
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Recommended contact point
    http://www.w3.org/ns/dcat#contactPoint
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Recommended endpoint description
    http://www.w3.org/ns/dcat#endpointDescription
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Recommended keyword
    http://www.w3.org/ns/dcat#keyword
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Recommended publisher
    http://purl.org/dc/terms/publisher
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Recommended serves dataset
    http://www.w3.org/ns/dcat#servesDataset
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Recommended theme
    http://www.w3.org/ns/dcat#theme
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional access rights
    http://purl.org/dc/terms/accessRights
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional applicable legislation
    http://data.europa.eu/r5r/applicableLegislation
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional creation date
    http://purl.org/dc/terms/created
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional creator
    http://purl.org/dc/terms/creator
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional custodian
    http://data.europa.eu/930/custodian
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional description
    http://purl.org/dc/terms/description
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional distributor
    http://data.europa.eu/930/distributor
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional format
    http://purl.org/dc/terms/format
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional geographical coverage
    http://purl.org/dc/terms/spatial
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional identifier
    http://purl.org/dc/terms/identifier
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional landing page
    http://www.w3.org/ns/dcat#landingPage
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional language
    http://purl.org/dc/terms/language
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional licence
    http://purl.org/dc/terms/license
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional modification date
    http://purl.org/dc/terms/modified
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional orginator
    http://data.europa.eu/930/originator
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional principal investigator
    http://data.europa.eu/930/principalInvestigator
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional processor
    http://data.europa.eu/930/processor
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional qualified attribution
    http://www.w3.org/ns/prov#qualifiedAttribution
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional reference system
    http://data.europa.eu/930/referenceSystem
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional release date
    http://purl.org/dc/terms/issued
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional resource provider
    http://data.europa.eu/930/resourceProvider
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional rights
    http://purl.org/dc/terms/rights
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional rights holder
    http://purl.org/dc/terms/rightsHolder
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional service category
    http://data.europa.eu/930/serviceCategory
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional service protocol
    http://data.europa.eu/930/serviceProtocol
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional service type
    http://data.europa.eu/930/serviceType
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional spatial resolution
    http://www.w3.org/ns/dqv#hasQualityMeasurement
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional spatial resolution as text
    http://data.europa.eu/930/spatialResolutionAsText
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional spatial resolution in metres
    https://www.w3.org/ns/dcat#spatialResolutionInMeters
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional temporal coverage
    http://purl.org/dc/terms/temporal
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional temporal resolution
    http://www.w3.org/ns/dcat#temporalResolution
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional topic category
    http://data.europa.eu/930/topicCategory
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional type
    http://data.europa.eu/930/resourceType
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional user
    http://data.europa.eu/930/user
    Data Service
    http://www.w3.org/ns/dcat#DataService
    Optional was used by
    http://www.w3.org/ns/prov#wasUsedBy
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Mandatory description
    http://purl.org/dc/terms/description
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Mandatory title
    http://purl.org/dc/terms/title
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Recommended contact point
    http://www.w3.org/ns/dcat#contactPoint
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Recommended dataset distribution
    http://www.w3.org/ns/dcat#distribution
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Recommended geographical coverage
    http://purl.org/dc/terms/spatial
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Recommended keyword
    http://www.w3.org/ns/dcat#keyword
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Recommended publisher
    http://purl.org/dc/terms/publisher
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Recommended temporal coverage
    http://purl.org/dc/terms/temporal
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Recommended theme
    http://www.w3.org/ns/dcat#theme
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional access rights
    http://purl.org/dc/terms/accessRights
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional applicable legislation
    http://data.europa.eu/r5r/applicableLegislation
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional conforms to
    http://purl.org/dc/terms/conformsTo
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional creation date
    http://purl.org/dc/terms/created
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional creator
    http://purl.org/dc/terms/creator
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional custodian
    http://data.europa.eu/930/custodian
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional distributor
    http://data.europa.eu/930/distributor
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional documentation
    http://xmlns.com/foaf/0.1/page
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional frequency
    http://purl.org/dc/terms/accrualPeriodicity
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional has version
    http://www.w3.org/ns/dcat#hasVersion
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional identifier
    http://purl.org/dc/terms/identifier
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional in series
    http://www.w3.org/ns/dcat#inSeries
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional is referenced by
    http://purl.org/dc/terms/isReferencedBy
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional landing page
    http://www.w3.org/ns/dcat#landingPage
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional language
    http://purl.org/dc/terms/language
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional modification date
    http://purl.org/dc/terms/modified
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional originator
    http://data.europa.eu/930/originator
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional other identifier
    http://www.w3.org/ns/adms#identifier
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional principal investigator
    http://data.europa.eu/930/principalInvestigator
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional processor
    http://data.europa.eu/930/processor
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional provenance
    http://purl.org/dc/terms/provenance
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional qualified attribution
    http://www.w3.org/ns/prov#qualifiedAttribution
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional qualified relation
    http://www.w3.org/ns/dcat#qualifiedRelation
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional reference system
    http://data.europa.eu/930/referenceSystem
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional related resource
    http://purl.org/dc/terms/relation
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional release date
    http://purl.org/dc/terms/issued
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional resource provider
    http://data.europa.eu/930/resourceProvider
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional resource type
    http://data.europa.eu/930/resourceType
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional rights
    http://purl.org/dc/terms/rights
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional rights holder
    http://purl.org/dc/terms/rightsHolder
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional sample
    http://www.w3.org/ns/adms#sample
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional source
    http://purl.org/dc/terms/source
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional spatial resolution
    http://www.w3.org/ns/dqv#hasQualityMeasurement
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional spatial resolution as text
    http://data.europa.eu/930/spatialResolutionAsText
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional spatial resolution in metres
    http://www.w3.org/ns/dcat#spatialResolutionInMeters
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional temporal resolution
    http://www.w3.org/ns/dcat#temporalResolution
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional topic category
    http://data.europa.eu/930/topicCategory
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional user
    http://data.europa.eu/930/user
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional version
    http://www.w3.org/ns/dcat#version
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional version notes
    http://www.w3.org/ns/adms#versionNotes
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional was generated by
    http://www.w3.org/ns/prov#wasGeneratedBy
    Dataset
    http://www.w3.org/ns/dcat#Dataset
    Optional was used by
    http://www.w3.org/ns/prov#wasUsedBy
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Mandatory title
    http://purl.org/dc/terms/title
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Recommended contact point
    http://www.w3.org/ns/dcat#contactPoint
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Recommended geographical coverage
    http://purl.org/dc/terms/spatial
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Recommended keyword
    http://www.w3.org/ns/dcat#keyword
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Recommended publisher
    http://purl.org/dc/terms/publisher
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Recommended temporal coverage
    http://purl.org/dc/terms/temporal
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Recommended theme
    http://www.w3.org/ns/dcat#theme
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional access rights
    http://purl.org/dc/terms/accessRights
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional applicable legislation
    http://data.europa.eu/r5r/applicableLegislation
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional conforms to
    http://purl.org/dc/terms/conformsTo
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional creation date
    http://purl.org/dc/terms/created
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional creator
    http://purl.org/dc/terms/creator
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional custodian
    http://data.europa.eu/930/custodian
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional dataset series distribution
    http://www.w3.org/ns/dcat#distribution
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional description
    http://purl.org/dc/terms/description
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional distributor
    http://data.europa.eu/930/distributor
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional documentation
    http://xmlns.com/foaf/0.1/page
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional frequency
    http://purl.org/dc/terms/accrualPeriodicity
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional has version
    http://www.w3.org/ns/dcat#hasVersion
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional identifier
    http://purl.org/dc/terms/identifier
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional in series
    http://www.w3.org/ns/dcat#inSeries
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional is referenced by
    http://purl.org/dc/terms/isReferencedBy
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional landing page
    http://www.w3.org/ns/dcat#landingPage
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional language
    http://purl.org/dc/terms/language
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional modification date
    http://purl.org/dc/terms/modified
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional originator
    http://data.europa.eu/930/originator
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional other identifier
    http://www.w3.org/ns/adms#identifier
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional principal investigator
    http://data.europa.eu/930/principalInvestigator
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional processor
    http://data.europa.eu/930/processor
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional qualified attribution
    http://www.w3.org/ns/prov#qualifiedAttribution
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional qualified relation
    http://www.w3.org/ns/dcat#qualifiedRelation
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional reference system
    http://data.europa.eu/930/referenceSystem
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional related resource
    http://purl.org/dc/terms/relation
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional release date
    http://purl.org/dc/terms/issued
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional resource provider
    http://data.europa.eu/930/resourceProvider
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional resource type
    http://data.europa.eu/930/resourceType
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional rights
    http://purl.org/dc/terms/rights
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional rights holder
    http://purl.org/dc/terms/rightsHolder
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional sample
    http://www.w3.org/ns/adms#sample
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional source
    http://purl.org/dc/terms/source
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional spatial resolution
    http://www.w3.org/ns/dqv#hasQualityMeasurement
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional spatial resolution as text
    http://data.europa.eu/930/spatialResolutionAsText
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional spatial resolution in metres
    http://www.w3.org/ns/dcat#spatialResolutionInMeters
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional topic category
    http://data.europa.eu/930/topicCategory
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional user
    http://data.europa.eu/930/user
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional version
    http://www.w3.org/ns/dcat#version
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional version notes
    http://www.w3.org/ns/adms#versionNotes
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional was generated by
    http://www.w3.org/ns/prov#wasGeneratedBy
    Dataset Series
    http://www.w3.org/ns/dcat#DatasetSeries
    Optional was used by
    http://www.w3.org/ns/prov#wasUsedBy
    Datatype
    http://www.w3.org/2000/01/rdf-schema#Datatype
    Dimension
    http://www.w3.org/ns/dqv#Dimension
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Mandatory access URL
    http://www.w3.org/ns/dcat#accessURL
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Recommended description
    http://purl.org/dc/terms/description
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Recommended format
    http://purl.org/dc/terms/format
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Recommended licence
    http://purl.org/dc/terms/license
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional access rights
    http://purl.org/dc/terms/accessRights
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional access service
    http://www.w3.org/ns/dcat#accessService
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional applicable legislation
    http://data.europa.eu/r5r/applicableLegislation
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional availability
    http://data.europa.eu/r5r/availability
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional byte size
    http://www.w3.org/ns/dcat#byteSize
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional character encoding
    http://www.w3.org/2011/content#characterEncoding
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional checksum
    http://spdx.org/rdf/terms#checksum
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional compression format
    http://www.w3.org/ns/dcat#compressFormat
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional documentation
    http://xmlns.com/foaf/0.1/page
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional download URL
    http://www.w3.org/ns/dcat#downloadURL
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional has policy
    http://www.w3.org/ns/odrl/2/hasPolicy
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional language
    http://purl.org/dc/terms/language
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional linked schemas
    http://purl.org/dc/terms/conformsTo
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional media type
    http://www.w3.org/ns/dcat#mediaType
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional modification date
    http://purl.org/dc/terms/modified
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional packaging format
    http://www.w3.org/ns/dcat#packageFormat
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional reference system
    http://data.europa.eu/930/referenceSystem
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional release date
    http://purl.org/dc/terms/issued
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional representation technique
    http://www.w3.org/ns/adms#representationTechnique
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional rights
    http://purl.org/dc/terms/rights
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional spatial resolution
    http://www.w3.org/ns/dqv#hasQualityMeasurement
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional spatial resolution as text
    http://data.europa.eu/930/spatialResolutionAsText
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional spatial resolution in metres
    http://www.w3.org/ns/dcat#spatialResolutionInMeters
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional status
    http://www.w3.org/ns/adms#status
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional temporal resolution
    http://www.w3.org/ns/dcat#temporalResolution
    Distribution
    http://www.w3.org/ns/dcat#Distribution
    Optional title
    http://purl.org/dc/terms/title
    Document
    http://xmlns.com/foaf/0.1/Document
    Optional description
    http://purl.org/dc/terms/description
    Document
    http://xmlns.com/foaf/0.1/Document
    Optional title
    http://purl.org/dc/terms/title
    Email (vCard)
    http://www.w3.org/2006/vcard/ns#Email
    Entity
    http://www.w3.org/ns/prov#Entity
    Frequency
    http://purl.org/dc/terms/Frequency
    Geometry
    http://www.w3.org/ns/locn#Geometry
    Identifier
    http://www.w3.org/ns/adms#Identifier
    Mandatory notation
    http://www.w3.org/2004/02/skos/core#notation
    Kind
    http://www.w3.org/2006/vcard/ns#Kind
    Optional address
    http://www.w3.org/2006/vcard/ns#hasAddress
    Kind
    http://www.w3.org/2006/vcard/ns#Kind
    Optional affiliation
    http://www.w3.org/2006/vcard/ns#organization-name
    Kind
    http://www.w3.org/2006/vcard/ns#Kind
    Optional email
    http://www.w3.org/2006/vcard/ns#hasEmail
    Kind
    http://www.w3.org/2006/vcard/ns#Kind
    Optional name
    http://www.w3.org/2006/vcard/ns#fn
    Kind
    http://www.w3.org/2006/vcard/ns#Kind
    Optional phone
    http://www.w3.org/2006/vcard/ns#hasTelephone
    Kind
    http://www.w3.org/2006/vcard/ns#Kind
    Optional URL
    http://www.w3.org/2006/vcard/ns#hasURL
    Legal Resource
    http://data.europa.eu/eli/ontology#LegalResource
    Licence Document
    http://purl.org/dc/terms/LicenseDocument
    Recommended type
    http://purl.org/dc/terms/type
    Linguistic system
    http://purl.org/dc/terms/LinguisticSystem
    Literal
    http://www.w3.org/2000/01/rdf-schema#Literal
    Location
    http://purl.org/dc/terms/Location
    Recommended bbox
    http://www.w3.org/ns/dcat#bbox
    Location
    http://purl.org/dc/terms/Location
    Recommended centroid
    http://www.w3.org/ns/dcat#centroid
    Location
    http://purl.org/dc/terms/Location
    Optional gazetteer
    http://www.w3.org/2004/02/skos/core#inScheme
    Location
    http://purl.org/dc/terms/Location
    Optional geograhic identifier
    http://purl.org/dc/terms/identifier
    Location
    http://purl.org/dc/terms/Location
    Optional geograhic name
    http://www.w3.org/2004/02/skos/core#prefLabel
    Location
    http://purl.org/dc/terms/Location
    Optional geometry
    http://www.w3.org/ns/locn#geometry
    Metric
    http://www.w3.org/ns/dqv#Metric
    Optional dimension
    http://www.w3.org/ns/dqv#inDimension
    Metric
    http://www.w3.org/ns/dqv#Metric
    Optional expected data type
    http://www.w3.org/ns/dqv#expectedDataType
    Organisation
    http://www.w3.org/ns/org#Organization
    Period of time
    http://purl.org/dc/terms/PeriodOfTime
    Recommended end date
    http://www.w3.org/ns/dcat#endDate
    Period of time
    http://purl.org/dc/terms/PeriodOfTime
    Recommended start date
    http://www.w3.org/ns/dcat#startDate
    Period of time
    http://purl.org/dc/terms/PeriodOfTime
    Optional beginning
    http://www.w3.org/2006/time#hasBeginning
    Period of time
    http://purl.org/dc/terms/PeriodOfTime
    Optional end
    http://www.w3.org/2006/time#hasEnd
    Policy
    http://www.w3.org/ns/odrl/2/Policy
    Provenance Statement
    http://purl.org/dc/terms/ProvenanceStatement
    Optional provenance statement text
    http://purl.org/dc/terms/description
    Quality Measurement
    http://www.w3.org/ns/dqv#QualityMeasurement
    Optional is measurement of
    http://www.w3.org/ns/dqv#isMeasurementOf
    Quality Measurement
    http://www.w3.org/ns/dqv#QualityMeasurement
    Optional unit of measure
    http://purl.org/linked-data/sdmx/2009/attribute#unitMeasure
    Quality Measurement
    http://www.w3.org/ns/dqv#QualityMeasurement
    Optional value
    http://www.w3.org/ns/dqv#value
    Relationship
    http://www.w3.org/ns/dcat#Relationship
    Mandatory had role
    http://www.w3.org/ns/dcat#hadRole
    Relationship
    http://www.w3.org/ns/dcat#Relationship
    Mandatory relation
    http://purl.org/dc/terms/relation
    Resource
    http://www.w3.org/2000/01/rdf-schema#Resource
    Rights statement
    http://purl.org/dc/terms/RightsStatement
    Optional rights statement text
    http://purl.org/dc/terms/description
    Role
    http://www.w3.org/ns/dcat#Role
    Standard
    http://purl.org/dc/terms/Standard
    Optional creation date
    http://purl.org/dc/terms/created
    Standard
    http://purl.org/dc/terms/Standard
    Optional description
    http://purl.org/dc/terms/description
    Standard
    http://purl.org/dc/terms/Standard
    Optional identifier
    http://purl.org/dc/terms/identifier
    Standard
    http://purl.org/dc/terms/Standard
    Optional reference register
    http://www.w3.org/2004/02/skos/core#ínScheme
    Standard
    http://purl.org/dc/terms/Standard
    Optional release date
    http://purl.org/dc/terms/issued
    Standard
    http://purl.org/dc/terms/Standard
    Optional title
    http://purl.org/dc/terms/title
    Standard
    http://purl.org/dc/terms/Standard
    Optional type
    http://purl.org/dc/terms/type
    Standard
    http://purl.org/dc/terms/Standard
    Optional update / modification date
    http://purl.org/dc/terms/modified
    Standard
    http://purl.org/dc/terms/Standard
    Optional version
    http://www.w3.org/2002/07/owl#versionInfo

    Acknowledgments

    The editors gratefully acknowledge the contributions made to this document by all members of the working group. Especially we would like to express our gratetude for the former editor and author Andrea Perego.

    This work was elaborated by a Working Group under SEMIC by Interoperable Europe in collaboration with DG Environment and JRC. Interoperable Europe of the European Commission was represented by Pavlina Fragkou. DG Environment was represented by Joeri Robbrecht and JRC by Jordi Escriu. Jakub Klímek, Bert Van Nuffelen, Pavlina Fragkou, Jitse De Cock, and Arthur Schiltz were the editors of this specification.

    Past and current contributors are : Paloma Abad , Anssi Ahlberg , Riccardo Albertoni , Martin Alvarez , Laima Amatniece , Darius Amilevicius , Inga Andriuskeviciute , Raphaelle Arnaud , Lars-Inge Arnevik , Claudia Attard , Teresa Barrueco , Julius Belickas , Laura Bolocan , Peter Bruhn Andersen , Dominique Buffet , Petr Bures , Mathieu Chaussier , Radoslav Chudy , Byron Cochrane , Eugeniu Costetchi , Bart Cosyn , Franck Cotton , Simon Cox , Rodolfo Da Silva , Vendula Dastychova , Ine de Visser , Pascal Derycke , Loes Deventer , Ilias Dimopoulos , Ulrika Domellof Mattsson , Erik Edberg , August Edstrom , Jitka Faugnerova , Benoit Fricheteau , Aniko Gerencser , Kety Giuliacci , Daniel Gomez , Jonas Gottschlich , Elena Grigoriou , Matthias Gronewald , Bjorn Hagstrom , Lena Hallin-Pihlatie , Gerald Henskens , Kim Hoang , Jana Hojsakova , Martin Hons , Hanna Horppila , Antoine Jacques , Markus Jobst , Stepan Kafka , Juliana Karciauskiene , Svetlogor Kirov , Fabian Kirstein , Ouns Kissiyar , Peter Kochmann , Jiri Kocourek , Jeff Konnen , Martin Koska , Lenka Kovacova , Pavla Kramolisova , Michal Kuban , Andreas Kuckartz , Veronika Kusova , Kim Lan Vu , Frithjof Lemmel , Darja Lihteneger , Anja Litka , Anja Loddenkemper , Emilio Lopez , Tamas Lorincz , Marceau Louis , Peter Lubrich , Kate Lyndegaard , Christoph Mikula , Martynas Mockus , Olga Moravcova , Stefanie Nadler , Gery Nicolay , Joachim Nielandt , Geraldine Nolf , Erik Obersteiner , Rossana Paciello , Matthias Palmer , Tamas Palya , James Passmore , Mihai Paunescu , Barbara Phiesel , Joel Plana , Francois Prunayre , Ines Quintanilha , Mart Randmae , Athina Rapsomaniki , Lenka Rejentova , Riikka Repo , Hannes Reuter , Ludger Rinsche , David Robberechts , Maik Roth , Antonio Rotundo , Thomas Ruhl , Danica Saponja , Giampaolo Sellitto , Silvie Semeradova , Age Sild , Jan Skornsek , Pawel Soczewski , Petr Soucek , Michele Spichtig , Simon Steuer , Corinne Straub , Aurelija Sturaite , Ivana Svata , Stijn Tallir , Naomi Thiru , Michal Tichy , Mayte Toscano , Martin Tuchyna , Thomas Tursics , Floor Van Damme , Danny Vandenbroucke , Kusova Veronika , Jose Vicente Calle , Fabio Vinci , Uwe Voges , Klaus-Peter Wenz , Melissa Wittens , Jim Yang , Jesper Zedlitz , Mantas Zimnickas .