The FR element set vocabularies include RDF classes and properties corresponding to FR entities, attributes, and relationships. Each class and property has a Uniform Resource Identifier (URI) for use in Semantic Web data triples.
A full de-referencing service is available for each URI. When used in an ordinary Web browser, the URI displays HTML pages with human-readable information about the element or concept. When used in a semantic browser, the URI retrieves machine-readable information in RDF/XML format. It is also possible to retrieve this format using an ordinary Web browser.
For example, the URI for the FRBR entity-relationship (FRBRer) model’s Group 1 entity “Work” is http://iflastandards.info/ns/fr/frbr/frbrer/C1001. To retrieve the RDF/XML information in a normal Web browser, use http://iflastandards.info/ns/fr/frbr/frbrer/C1001.rdf; that is, add the file extension “.rdf” to the URI.
Another example is the FRSAD attribute “has appellation”: the URI of the corresponding RDF property is http://iflastandards.info/ns/fr/frsad/P2003 and the RDF/XML file can be retrieved in a normal browser using the URL http://iflastandards.info/ns/fr/frsad/P2003.rdf.
The element set for a specific FR model can be accessed as follows:
- FRBRer: http://iflastandards.info/ns/fr/frbr/frbrer/
- FRAD: http://iflastandards.info/ns/fr/frad/
- FRSAD: http://iflastandards.info/ns/fr/frsad/
These element sets reflect the current published models, however, as the FR family is in the process of being consolidated, this may result in the eventual deprecation of some URIs.
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