]> DCAT Application Profile for Data Portals in Europe 2021-12-01 The DCAT Application profile for data portals in Europe (DCAT-AP) is a specification based on the Data Catalogue vocabulary (DCAT) for describing public sector datasets in Europe. Its basic use case is to enable a cross-data portal search for data sets and make public sector data better searchable across borders and sectors. This can be achieved by the exchange of descriptions of data sets among data portals. European Commission This document specifies the set of RDF classes and properties used in the DCAT Application profile for data portals in Europe (DCAT-AP). 2.1.0 Change log for DCAT-AP v2.1.0: see github Attribution 4.0 International (CC BY 4.0) European Commission DCAT-AP logo &methodologyTitle; Makx Dekkers AMI Consult Vassilios Peristeras European Commission Nikolaos Loutas PwC EU Services Natasa Sofou Artificial Intelligence and Learning Systems Laboratory, National Technical University of Athens Bert Van Nuffelen TenForce DCAT-AP Working Group Mandatory class. A catalogue or repository that hosts the Datasets being described. dcat:Catalog Catalogue A curated collection of metadata about datasets Mandatory class. An entity that is associated with Catalogues and/or Datasets. If the Agent is an organisation, the use of the Organization Ontology is recommended. foaf:Agent Agent An agent (eg. person, group, software or physical artifact). Mandatory class. A conceptual entity that represents the information published. dcat:Dataset Dataset A collection of data, published or curated by a single source, and available for access or download in one or more formats Mandatory class. 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. rdfs:Literal Literal The class rdfs:Literal is the class of literal values such as strings and integers. Property values such as textual strings are examples of RDF literals. Mandatory class. Anything described by RDF. rdfs:Resource Resource All things described by RDF are called resources, and are instances of the class rdfs:Resource. This is the class of everything. All other classes are subclasses of this class. rdfs:Resource is an instance of rdfs:Class. Recommended class - Category: a subject of a Dataset. Optional Class - Publisher type: A type of organisation that acts as a publisher. Optional Class - Status: an indication of the maturity of a Distribution. skos:Concept Category, Publisher type, Status An abstract idea or notion; a unit of thought. Recommended class. A physical embodiment of the Dataset in a particular format. dcat:Distribution Distribution Represents a specific available form of a dataset. Each dataset might be available in different forms, these forms might represent different formats of the dataset, different endpoints,... Examples of Distribution include a downloadable CSV file, an XLS file representing the dataset, an RSS feed… Recommended class. A legal document giving official permission to do something with a resource. dct:LicenseDocument Licence Document A legal document giving official permission to do something with a Resource. Recommended class. A concept collection (e.g. controlled vocabulary) in which the Category is defined. skos:ConceptScheme Category scheme An abstract idea or notion; a unit of thought. Optional class. A description of a Dataset’s entry in the Catalogue. dcat:CatalogRecord Catalogue Record A record in a data catalog, describing a single dataset. A value that allows the contents of a file to be authenticated. This class allows the results of a variety of checksum and cryptographic message digest algorithms to be represented. spdx:Checksum Checksum A value that allows the contents of a file to be authenticated. This class allows the results of a variety of checksum and cryptographic message digest algorithms to be represented. Optional class. A textual resource intended for human consumption that contains information, e.g. a web page about a Dataset. foaf:Document Document A document. Optional class. A rate at which something recurs, e.g. the publication of a Dataset. dct:Frequency Frequency A rate at which something recurs. Optional class. An identifier in a particular context, consisting of the 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 adms:Identifier Identifier This class is based on the UN/CEFACT Identifier complex type defined in See Section 5.8 of Core Components Data Type Catalogue Version 3.1 (http://www.unece.org/fileadmin/DAM/cefact/codesfortrade/CCTS/CCTS-DTCatalogueVersion3p1.pdf) In RDF this is expressed using the following properties: - the content string should be provided using skos:notation, datatyped with the identifier scheme (inclduing the version number if appropriate); - use dcterms:creator to link to a class describing the agency that manages the identifier scheme or adms:schemaAgency to provide the name as a literal. Although not part of the ADMS conceptual model, it may be useful to provide further properties to the Identifier class such as dcterms:created to provide the date on which the identifier was issued. Optional class. A description following the vCard specification, e.g. to provide telephone number and e-mail address for a contact point. Note that the class Kind is the parent class for the four explicit types of vCards (Individual, Organization, Location, Group). vcard:Kind Kind A description following the vCard specification, e.g. to provide telephone number and e-mail address for a contact point. Note that the class Kind is the parent class for the four explicit types of vCards (Individual, Organization, Location, Group). Optional class. A system of signs, symbols, sounds, gestures, or rules used in communication, e.g. a language. dct:LinguisticSystem Linguistic system A system of signs, symbols, sounds, gestures, or rules used in communication, e.g. a language. Optional class. A spatial region or named place. 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. dct:Location Location A spatial region or named place. Optional class. A media type or extent, e.g. the format of a computer file. dct:MediaType Media type A media type or extent, e.g. the format of a computer file. Optional class. An interval of time that is named or defined by its start and end dates. dct:PeriodOfTime Period of time An interval of time that is named or defined by its start and end dates. Optional class. 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. dct:RightsStatement Rights statement 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. Optional class. A statement of any changes in ownership and custody of a resource since its creation that are significant for its authenticity, integrity, and interpretation. dct:ProvenanceStatement Provenance Statement A statement of any changes in ownership and custody of a resource since its creation that are significant for its authenticity, integrity, and interpretation. Optional class. A standard or other specification to which a Dataset conforms. dct:Standard Standard A basis for comparison; a reference point against which other things can be evaluated. Optional class. A collection of operations that provides access to one or more datasets or data processing functions. dcat:DataService Data Service A collection of operations that provides access to one or more datasets or data processing functions. Optional class. An association class for attaching additional information to a relationship between DCAT Resources. dcat:Relationship Relationship An association class for attaching additional information to a relationship between DCAT Resources. Optional class. A role is the function of a resource or agent with respect to another resource, in the context of resource attribution or resource relationships. Note it is a subclass of skos:Concept. Role A role is the function of a resource or agent with respect to another resource, in the context of resource attribution or resource relationships. Mandatory property. This property links the Catalogue with a Dataset that is part of the Catalogue. dcat:dataset Data Catalogue - dataset A dataset that is part of the catalog. Mandatory property. This property contains a free-text account of the Catalogue. This property can be repeated for parallel language versions of the description. dct:description Data Catalogue - description Description may include but is not limited to: an abstract, a table of contents, a graphical representation, or a free-text account of the resource. Mandatory property. This property refers to an entity (organisation) responsible for making the Catalogue available. dct:publisher Data Catalogue - publisher This property refers to an entity (organisation) responsible for making the Catalogue available. Mandatory property. This property contains a name given to the Catalogue. This property can be repeated for parallel language versions of the name. dct:title Data Catalogue - title This property contains a name given to the Catalogue. This property can be repeated for parallel language versions of the name. Recommended property. This property refers to a web page that acts as the main page for the Catalogue. foaf:homepage Data Catalogue - homepage This property refers to a web page that acts as the main page for the Catalogue. Recommended property. This property refers to a language used in the textual metadata describing titles, descriptions, etc. of the Datasets in the Catalogue. This property can be repeated if the metadata is provided in multiple languages. dct:language Data Catalogue - language This property refers to a language used in the textual metadata describing titles, descriptions, etc. of the Datasets in the Catalogue. This property can be repeated if the metadata is provided in multiple languages. Recommended property. This property refers to the licence under which the Catalogue can be used or reused. dct:license Data Catalogue - licence This property refers to the licence under which the Catalogue can be used or reused. Recommended property. This property contains the date of formal issuance (e.g., publication) of the Catalogue. dct:issued Data Catalogue - release date This property contains the date of formal issuance (e.g., publication) of the Catalogue. Recommended property. This property refers to a knowledge organization system (KOS) used to classify the Catalogue's Datasets. dcat:themeTaxonomy Data Catalogue - themes The knowledge organization system (KOS) used to classify catalog's datasets Recommended property. This property contains the most recent date on which the Catalogue was changed or modified. dct:modified Data Catalogue - update/ modification date This property contains the most recent date on which the Catalogue was changed or modified. Recommended property. This property refers to a geographical area covered by the Catalogue. dct:spatial Data Catalogue - spatial / geographic This property refers to a geographical area covered by the Catalogue. Optional property. This property refers to a Catalogue Record that is part of the Catalogue dcat:record Data Catalogue - record This property refers to a Catalogue Record that is part of the Catalogue Optional property. This property refers to a statement that specifies rights associated with the Catalogue. dct:rights Data Catalogue - rights This property refers to a statement that specifies rights associated with the Catalogue. Optional property. This property refers to a related Catalogue that is part of the described Catalogue. dct:hasPart Data Catalogue - has part This property refers to a related Catalogue that is part of the described Catalogue Optional property. This property refers to a related Catalogue in which the described Catalogue is physically or logically included. dct:isPartOf Data Catalogue - is part of This property refers to a related Catalogue in which the described Catalogue is physically or logically included. Optional property. This property refers to a site or end-point that is listed in the catalog. dcat:service Data Catalogue - service This property refers to a site or end-point that is listed in the catalog. . Optional property. This property refers to a catalog whose contents are of interest in the context of this catalog . dcat:catalog Data Catalogue - catalog This property refers to a catalog whose contents are of interest in the context of this catalog . Optional property. This property refers to an entity primarily responsible for making the resource. dct:creator Data Catalogue- creator This property refers to an entity primarily responsible for making the catalogue. Mandatory property. This property links the Catalogue Record to the Dataset, Data Service or Catalogue described in the record. foaf:primaryTopic Catalogue Record - primary topic This property links the Catalogue Record to the Dataset, Data Service or Catalogue described in the record. Mandatory property. This property contains the most recent date on which the Catalogue entry was changed or modified. dct:modified Catalogue Record - update/ modification date This property contains the most recent date on which the Catalogue entry was changed or modified. Recommended property. This property contains the date on which the description of the Dataset was included in the Catalogue. dct:issued Catalogue Record - listing date This property contains the date on which the description of the Dataset was included in the Catalogue. Recommended property. The type of the latest revision of a Dataset's entry in the Catalogue. It MUST take one of the values :created, :updated or :deleted depending on whether this latest revision is a result of a creation, update or deletion. adms:status Catalogue Record - change type The type of the latest revision of a Dataset's entry in the Catalogue. It MUST take one of the values :Completed, :Depricated, :Under development or :Withdrawn. Recommended property. This property refers to an Application Profile that the Dataset’s metadata conforms to. dct:conformsTo Catalogue Record - conforms to This property refers to an Application Profile that the Dataset’s metadata conforms to. Optional property. This property contains a free-text account of the record. This property can be repeated for parallel language versions of the description. dct:description Catalogue Record - description This property contains a free-text account of the record. This property can be repeated for parallel language versions of the description. Optional property. This property contains a name given to the Catalogue. This property can be repeated for parallel language versions of the name. dct:title Catalogue Record - title This property contains a name given to the Catalogue. This property can be repeated for parallel language versions of the name. Optional property. This property refers to a language used in the textual metadata describing titles, descriptions, etc. of the Dataset. This property can be repeated if the metadata is provided in multiple languages. dct:language Catalogue Record - language This property refers to a language used in the textual metadata describing titles, descriptions, etc. of the Dataset. This property can be repeated if the metadata is provided in multiple languages. Optional property. This property refers to the original metadata that was used in creating metadata for the Dataset. dct:source Catalogue Record - source metadata This property refers to the original metadata that was used in creating metadata for the Dataset. Mandatory property. The root location or primary endpoint of the service (an IRI).. dcat:endpointURL Data Service - endpoint URL The root location or primary endpoint of the service (an IRI). Mandatory property. This property contains a name given to the Data Service. This property can be repeated for parallel language versions of the name. dct:title Data Service - title This property contains a name given to the Data Service. This property can be repeated for parallel language versions of the name. Recommended property. A collection of data that this data service can distribute. dcat:servesDataset Data Service - serves dataset A collection of data that this data service can distribute. Recomended property. A description of the services available via the end-points, including their operations, parameters etc . dcat:endpointDescription Data Service - endpoint description A description of the services available via the end-points, including their operations, parameters etc. Optional property. This property contains a free-text account of the Catalogue. This property can be repeated for parallel language versions of the description. dct:description Data Service - description Description may include but is not limited to: an abstract, a table of contents, a graphical representation, or a free-text account of the resource. Optional property. This property refers to the licence under which the Catalogue can be used or reused. dct:license Data Service - licence This property refers to the licence under which the Catalogue can be used or reused. Optional property. This property refers to information that indicates whether the Dataset is open data, has access restrictions or is not public. A controlled vocabulary with three members (:public, :restricted, :non-public) will be created and maintained by the Publications Office of the EU. dct:accessRights Data Service - access rights This property refers to information that indicates whether the Dataset is open data, has access restrictions or is not public. A controlled vocabulary with three members (:public, :restricted, :non-public) will be created and maintained by the Publications Office of the EU. Mandatory property. This property contains a free-text account of the Dataset. This property can be repeated for parallel language versions of the description. dct:description Dataset - description This property contains a free-text account of the Dataset. This property can be repeated for parallel language versions of the description. Mandatory property. This property contains a name given to the Dataset. This property can be repeated for parallel language versions of the name. dct:title Dataset - title This property contains a name given to the Dataset. This property can be repeated for parallel language versions of the name. Recommended property.This property contains contact information that can be used for sending comments about the Dataset. dcat:contactPoint Dataset - contact point This property contains contact information that can be used for sending comments about the Dataset. Recommended property. This property links the Dataset to an available Distribution. dcat:distribution Dataset - dataset distribution This property links the Dataset to an available Distribution. Recommended property. This property contains a keyword or tag describing the Dataset. dcat:keyword Dataset - keyword/ tag This property contains a keyword or tag describing the Dataset. Recommended property. This property refers to an entity (organisation) responsible for making the Dataset available. dct:publisher Dataset - publisher This property refers to an entity (organisation) responsible for making the Dataset available. Recommended property. This property refers to a geographic region that is covered by the Dataset. dct:spatial Dataset - spatial/ geographical coverage This property refers to a geographic region that is covered by the Dataset. Recommended property. This property refers to a category of the Dataset. A Dataset may be associated with multiple themes. Subproperty of dct:subject. dcat:theme Dataset - theme/category This property refers to a category of the Dataset. A Dataset may be associated with multiple themes. Subproperty of dct:subject Recommended property. This property refers to a temporal period that the Dataset covers. dct:temporal Dataset - temporal coverage This property refers to a temporal period that the Dataset covers. Optional property. This property refers to an implementing rule or other specification. dct:conformsTo Dataset - conforms to This property refers to an implementing rule or other specification. Optional property. This property refers to the frequency at which Dataset is updated. dct:accrualPeriodicity Dataset - frequency This property refers to the frequency at which Dataset is updated. Optional property. This property contains the main identifier for the Dataset, e.g. the URI or other unique identifier in the context of the Catalogue. dct:identifier Dataset - identifier This property contains the main identifier for the Dataset, e.g. the URI or other unique identifier in the context of the Catalogue. Optional property. This property refers to a web page that provides access to the Dataset, its Distributions and/or additional information. dcat:landingPage Dataset - landing page This property refers to a web page that provides access to the Dataset, its Distributions and/or additional information. Optional property. This property refers to a language of the Dataset. This property can be repeated if there are multiple languages in the Dataset. dct:language Dataset - language This property refers to a language of the Dataset. This property can be repeated if there are multiple languages in the Dataset. Optional property. This property refers to a secondary identifier of the Dataset, such as MAST/ADS[1], DataCite[2], DOI[3], EZID[4] or W3ID[5]. adms:identifier Dataset - other identifier This property refers to a secondary identifier of the Dataset, such as MAST/ADS[1], DataCite[2], DOI[3], EZID[4] or W3ID[5]. Optional property. This property contains the date of formal issuance (e.g., publication) of the Dataset. dct:issued Dataset - release date This property contains the date of formal issuance (e.g., publication) of the Dataset. Optional property. This property contains the most recent date on which the Dataset was changed or modified. dct:modified Dataset - update/ modification date This property contains the most recent date on which the Dataset was changed or modified. Optional property. This property contains a statement about the lineage of a Dataset. dct:provenance Dataset - provenance This property contains a statement about the lineage of a Dataset. Optional property. This property refers to a sample distribution of the dataset. adms:sample Dataset - sample This property refers to a sample distribution of the dataset. Optional property. This property refers to a related Dataset from which the described Dataset is derived. dct:source Dataset - source This property refers to a related Dataset from which the described Dataset is derived. Optional property. This property refers to the type of the Dataset. A controlled vocabulary for the values has not been established. dct:type Dataset - type This property refers to the type of the Dataset. A controlled vocabulary for the values has not been established. Optional property. This property refers to a related resource. dct:relation Dataset - related resource This property refers to a related resource. Optional property. This property contains a version number or other version designation of the Dataset. owl:versionInfo Dataset - version This property contains a version number or other version designation of the Dataset. Optional property. This property contains a description of the differences between this version and a previous version of the Dataset. adms:versionNotes Dataset - version notes This property contains a description of the differences between this version and a previous version of the Dataset. Optional property. This property refers to a related Dataset of which the described Dataset is a version, edition, or adaptation. dct:isVersionOf Dataset - is Version Of This property refers to a related Dataset of which the described Dataset is a version, edition, or adaptation. Optional property.This property refers to a related Dataset that is a version, edition, or adaptation of the described Dataset. dct:hasVersion Dataset - has Version This property refers to a related Dataset that is a version, edition, or adaptation of the described Dataset. Optional property. This property refers to a page or document about this Dataset. foaf:page Dataset - documentation This property refers to a page or document about this Dataset. Optional property. This property refers to information that indicates whether the Dataset is open data, has access restrictions or is not public. A controlled vocabulary with three members (:public, :restricted, :non-public) will be created and maintained by the Publications Office of the EU. dct:accessRights Dataset - access Rights This property refers to information that indicates whether the Dataset is open data, has access restrictions or is not public. A controlled vocabulary with three members (:public, :restricted, :non-public) will be created and maintained by the Publications Office of the EU. Optional property. This property refers to an entity primarily responsible for making the resource. dct:creator Dataset - creator This property refers to an entity primarily responsible for making the dataset. Optional property. This property refers to the link to an Agent having some form of responsibility for the resource. prov:qualifiedAttribution Dataset - qualified attribution This property refers to the link to an Agent having some form of responsibility for the resource. Optional property. This property refers to an activity that generated, or provides the business context for, the creation of the dataset. prov:wasGeneratedBy Dataset - was generated by This property refers to an activity that generated, or provides the business context for, the creation of the dataset. Optional property. This property refers to the minimum time period resolvable in the dataset. dcat:temporalResolution Dataset - This property refers to the minimum time period resolvable in the dataset. . Optional property. This property refers to the minimum spatial separation resolvable in a dataset, measured in meters. dcat:spatialResolutionInMeters Dataset - This property refers to the minimum spatial separation resolvable in a dataset, measured in meters. Optional property. This property provides a link to a description of a relationship with another resource. dcat:qualifiedRelation Dataset - qualified relation This property provides a link to a description of a relationship with another resource. Optional property. This property refers to a related resource, such as a publication, that references, cites, or otherwise points to the dataset. dct:isReferencedBy Dataset - is referenced By This property refers to a related resource, such as a publication, that references, cites, or otherwise points to the dataset. Mandatory property. This property contains a URL that gives access to a Distribution of the Dataset. The resource at the access URL may contain information about how to get the Dataset. dcat:accessURL Distribution - access URL This property contains a URL that gives access to a Distribution of the Dataset. The resource at the access URL may contain information about how to get the Dataset. Recommended property. This property indicates how long it is planned to keep the Distribution of the Dataset available . dcatap:availability Distribution - availability This property indicates how long it is planned to keep the Distribution of the Dataset available. Recommended property. This property contains a free-text account of the Distribution. This property can be repeated for parallel language versions of the description. dct:description Distribution - description This property can be repeated for parallel language versions of the description. Recommended property. This property refers to the file format of the Distribution. dct:format Distribution - format This property refers to the file format of the Distribution. Recommended property. This property refers to the licence under which the Distribution is made available. dct:license Distribution - licence This property refers to the licence under which the Distribution is made available. Optional property. This property contains the size of a Distribution in bytes. dcat:byteSize Distribution - byte size This property contains the size of a Distribution in bytes. Optional property. This property contains a URL that is direct link to a downloadable file in a given format. dcat:downloadURL Distribution - download URL This property contains a URL that is direct link to a downloadable file in a given format. Optional property. Subproperty of dct:format. This property refers to the media type of the Distribution if this is defined in IANA. dcat:mediaType Distribution - media type This property refers to the media type of the Distribution if this is defined in IANA. Optional property. This property contains the date of formal issuance (e.g., publication) of the Distribution. dct:issued Distribution - release date This property contains the date of formal issuance (e.g., publication) of the Distribution. Optional property. This property refers to a statement that specifies rights associated with the Distribution. dct:rights Distribution - rights This property refers to a statement that specifies rights associated with the Distribution. Optional property. This property refers to the maturity of the Distribution. adms:status Distribution - status This property refers to the maturity of the Distribution Optional property. This property contains a name given to the Distribution. This property can be repeated for parallel language versions of the description. dct:title Distribution - title This property contains a name given to the Distribution. This property can be repeated for parallel language versions of the description. Optional property. This property contains the most recent date on which the Distribution was changed or modified. dct:modified Distribution - update/modification date This property contains the most recent date on which the Distribution was changed or modified. Optional property. This property refers to an established schema to which the described Distribution conforms. dct:conformsTo Distribution - linked schemas This property refers to an established schema to which the described Distribution conforms. Optional property. This property refers to a language used in the Distribution. This property can be repeated if the metadata is provided in multiple languages. dct:language Distribution - language This property refers to a language used in the Distribution. Optional property.This property provides a mechanism that can be used to verify that the contents of a distribution have not changed. The checksum is related to the downloadURL. spdx:checksum distribution - checksum This property provides a mechanism that can be used to verify that the contents of a distribution have not changed. Optional property.This property refers to a page or document about this Distribution. foaf:page Distribution - documentation This property refers to a page or document about this Distribution. Optional property. This property refers to a policy expressing the rights associated with the resource if using the ODRL vocabulary. odrl:hasPolicy Distribution - has policy This property refers to a policy expressing the rights associated with the resource if using the ODRL vocabulary. Optional property. This property refers to a data service that gives access to the distribution of the dataset. dcat:accessService Distribution - access service This property refers to the a data service that gives access to the distribution of the dataset . Optional property. This property refers to the minimum spatial separation resolvable in a dataset distribution, measured in meters. . dcat:spatialResolutionInMeters Distribution - spatial resolution This property refers to the minimum spatial separation resolvable in a dataset distribution, measured in meters. . Optional property. This property refers to the minimum time period resolvable in the dataset distribution . dcat:temporalResolution Distribution - temporal resolution This property refers to the minimum time period resolvable in the dataset distribution . Optional property. This property refers to 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. dcat:compressFormat Distribution - compression format This property refers to 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 . Optional property. This property refers to 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. dcat:packageFormat Distribution - packaging format This property refers to 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. Mandatory property. This property contains a name of the agent. This property can be repeated for different versions of the name (e.g. the name in different languages) foaf:name Agent - name This property can be repeated for different versions of the name (e.g. the name in different languages) Recommended property. This property refers to a type of the agent that makes the Catalogue or Dataset available dct:type Agent - type This property refers to a type of the agent that makes the Catalogue or Dataset availabl Mandatory property. This property contains a name of the category scheme. May be repeated for different versions of the name dct:title Category Scheme - title This property contains a name of the category scheme. May be repeated for different versions of the name Mandatory property. This property identifies the algorithm used to produce the subject Checksum. Currently, SHA-1 is the only supported algorithm. It is anticipated that other algorithms will be supported at a later time. spdx:algorithm Checksum - algorithm Identifies the algorithm used to produce the subject Checksum. Currently, SHA-1 is the only supported algorithm. It is anticipated that other algorithms will be supported at a later time. Mandatory property. This property provides a lower case hexadecimal encoded digest value produced using a specific algorithm. spdx:checksumValue Checksum - checksum value This property provides a lower case hexadecimal encoded digest value produced using a specific algorithm. Mandatory property. This property contains a preferred label of the category. This property can be repeated for parallel language versions of the label. skos:prefLabel Category - preferred label This property can be repeated for parallel language versions of the label. Recommended property. This property refers to a type of licence, e.g. indicating ‘public domain’ or ‘royalties required’. dct:type Licence Document - licence type This property refers to a type of licence, e.g. indicating ‘public domain’ or ‘royalties required’. Mandatory property. This property contains a string that is an identifier in the context of the identifier scheme referenced by its datatype. skos:notation Identifier - notation This property contains a string that is an identifier in the context of the identifier scheme referenced by its datatype. Recommended property. This property contains the start of the period. dcat:startDate Period Of Time - start date This property contains the start of the period. Recommended property. This property contains the end of the period. dcat:endDate Period Of Time - end date This property contains the end of the period. Optional property. This property refers to the beginning of a period or interval. time:hasBeginning Period Of Time - beginning This property refers to the beginning of a period or interval. Optional property. This property refers to the end of a period or interval. time:hasEnd Period Of Time - end This property refers to the end of a period or interval. Optional property. This property associates any resource with the corresponding geometry. locn:geometry Location - geometry This property associates any resource with the corresponding geometry Recommended property. This propert refers to the geographic bounding box of a resource. dcat:bbox Location - bounding box This propert refers to the geographic bounding box of a resource. Recommended property. This property refers to the geographic center (centroid) of a resource. dcat:centroid Location - centroid This property refers to the geographic center (centroid) of a resource Mandatory property.This property refers to the resource related to the source resource. . dct:relation Relationship - relation This property refers to the resource related to the source resource. Mandatory property. The function of an entity or agent with respect to another entity or resource.. dcat:hadRole Relationship - had role The function of an entity or agent with respect to another entity or resource. availability The knowledge organization system (KOS) used to classify Datase Distribution availability levels. 1.0 List of availability levels. List of availability levels The list of terms for the avalability levels of a dataset distribution in the DCAT-AP specification. List of availability levels http://data.europa.eu/r5r/availability/1.0 http://purl.org/adms/status/Deprecated temporary http://purl.org/adms/status/Deprecated temporary Data can disappear at any time, no planning. experimental http://purl.org/adms/status/Deprecated experimental Data is available on a trial basis, the expected availability is roughly a year. available http://purl.org/adms/status/Deprecated available Data is available for a few years, medium term planning. stable http://purl.org/adms/status/Deprecated stable Data will remain available in the long term.