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Predefined keywords

All keywords listed on this page (except for the special "@"-prefixed keywords) are defined in the default JSON-LD context. See User-defined keywords for how to extend this list with additional namespace prefixes.

Special keywords for JSON-LD

See the JSON-LD documentation for a complete list of "@"-prefixed keywords. Here we only list those that are commonly used for data documentation with Tripper.

  • @context (IRI): URL to or dict with user-defined JSON-LD context. Used to extend the keywords listed on this page with domain- or application-specific keywords.
  • @id (IRI): IRI identifying the documented resource.
  • @type (IRI): IRI of ontological class that defines what the resource is.

General properties on resources used by DCAT

These can also be used on datasets and distributions. See the DCAT documentation for dcat:Dataset and dcat:Distribution for recommendations.

  • accessRights (Literal): Information about who can access the resource or an indication of its security status.
  • conformsTo (Literal): An established standard to which the described resource conforms.
  • contactPoint (Literal): Relevant contact information for the cataloged resource. Use of vCard is recommended.
  • creator (Literal): The entity responsible for producing the resource.
  • description (Literal): A free-text account of the resource.
  • hasCurrentVersion (Literal): This resource has a more specific, versioned resource with equivalent content.
  • hasPart (IRI): A related resource that is included either physically or logically in the described resource.
  • hasPolicy (Literal): An ODRL conformant policy expressing the rights associated with the resource.
  • hasVersion (Literal): This resource has a more specific, versioned resource.
  • identifier (Literal): A unique identifier of the resource being described or cataloged.
  • isReferencedBy (Literal): A related resource, such as a publication, that references, cites, or otherwise points to the cataloged resource.
  • issued (Literal): Date of formal issuance (e.g., publication) of the resource.
  • keyword (Literal): A keyword or tag describing the resource.
  • landingPage (Literal): A Web page that can be navigated to in a Web browser to gain access to the catalog, a dataset, its distributions and/or additional information.
  • language (Literal): A language of the resource. This refers to the natural language used for textual metadata (i.e., titles, descriptions, etc.) of a cataloged resource (i.e., dataset or service) or the textual values of a dataset distribution.
  • license (Literal): A legal document under which the resource is made available.
  • modified (Literal): Most recent date on which the resource was changed, updated or modified.
  • publisher (Literal): The entity responsible for making the resource available.
  • qualifiedAttribution (IRI): Link to an Agent having some form of responsibility for the resource.
  • qualifiedRelation (IRI): Link to a description of a relationship with another resource.
  • relation (IRI): A resource with an unspecified relationship to the cataloged resource.
  • replaces (IRI): A related resource that is supplanted, displaced, or superseded by the described resource.
  • rights (Literal): A statement that concerns all rights not addressed with license or accessRights, such as copyright statements.
  • status (Literal): The status of the resource in the context of a particular workflow process.
  • theme (Literal): A main category of the resource. A resource can have multiple themes.
  • title (Literal): A name given to the resource.
  • type (Literal): The nature or genre of the resource.
  • version (Literal): The version indicator (name or identifier) of a resource.
  • versionNotes (Literal): A description of changes between this version and the previous version of the resource.

Other general properties on resources

  • abstract (Literal): A summary of the resource.
  • bibliographicCitation (Literal): A bibliographic reference for the resource. Recommended practice is to include sufficient bibliographic detail to identify the resource as unambiguously as possible.
  • comment (Literal): A description of the subject resource. Use description instead.
  • deprecated (Literal): The annotation property that indicates that a given entity has been deprecated. It should equal to "true"^^xsd:boolean.
  • isDefinedBy (Literal): Indicate a resource defining the subject resource. This property may be used to indicate an RDF vocabulary in which a resource is described.
  • label (Literal): Provides a human-readable version of a resource's name.
  • [scopeNote] (Literal): A note that helps to clarify the meaning and/or the use of a concept.
  • seeAlso (Literal): Indicates a resource that might provide additional information about the subject resource.
  • source (Literal): A related resource from which the described resource is derived.
  • statements (Literal JSON): A list of subject-predicate-object triples with additional RDF statements documenting the resource.

Properties specific for datasets

  • datamodel (Literal): URI of DLite datamodel for the dataset.
  • datamodelStorage (Literal): URL to DLite storage plugin where the datamodel is stored.
  • distribution (IRI): An available distribution of the dataset.
  • hasDatum (IRI): Relates a dataset to its datum parts. hasDatum relations are normally specified manually, since they are generated from the DLite data model.
  • inSeries (IRI): A dataset series of which the dataset is part.
  • isDescriptionFor (IRI): An object (e.g. a material) that this dataset describes.
  • isInputOf (IRI): A process that this dataset is the input to.
  • isOutputOf (IRI): A process that this dataset is the output of.
  • mappings (Literal JSON): A list of subject-predicate-object triples mapping the datamodel to ontological concepts.
  • mappingURL (Literal): URL to a document defining the mappings of the datamodel. The file format is given by mappingFormat. Defaults to turtle.
  • mappingFormat (Literal): File format for mappingURL. Defaults to turtle.
  • spatial (Literal): The geographical area covered by the dataset.
  • spatialResolutionMeters (Literal): Minimum spatial separation resolvable in a dataset, measured in meters.
  • temporal (Literal): The temporal period that the dataset covers.
  • temporalResolution (Literal): Minimum time period resolvable in the dataset.
  • wasGeneratedBy (Literal): An activity that generated, or provides the business context for, the creation of the dataset.

Properties specific for distributions

  • accessService (IRI): A data service that gives access to the distribution of the dataset.
  • accessURL (Literal): A URL of the resource that gives access to a distribution of the dataset. E.g., landing page, feed, SPARQL endpoint.
  • byteSize (Literal): The size of a distribution in bytes.
  • checksum (IRI): The checksum property provides a mechanism that can be used to verify that the contents of a file or package have not changed.
  • compressFormat (Literal): The compression format of the distribution in which the data is contained in a compressed form, e.g., to reduce the size of the downloadable file.
  • downloadURL (Literal): The URL of the downloadable file in a given format. E.g., CSV file or RDF file. The format is indicated by the distribution's format and/or mediaType.
  • format (Literal): The file format of the distribution. Use mediaType instead if the type of the distribution is defined by IANA.
  • generator (IRI): A generator that can create the distribution.
  • mediaType (Literal): The media type of the distribution as defined by IANA.
  • packageFormat (Literal): The package format of the distribution in which one or more data files are grouped together, e.g., to enable a set of related files to be downloaded together.
  • parser (IRI): A parser that can parse the distribution.

Properties for parsers and generators

  • configuration (Literal JSON): A JSON string with configurations specific to the parser or generator.
  • generatorType (Literal): Generator type. Ex: application/vnd.dlite-generate.
  • parserType (Literal): Parser type. Ex: application/vnd.dlite-parse.