SkosCoreGuideToc/SectionRelations
Concept Hierarchies and Relationships
This section describes how to declare relationships between concepts.
See also the section [custom semantic relation properties].
Hierarchies
To describe the fact that one concept is 'broader' in sense than another (i.e. is more general in scope), do for example (adapted from GCL [ref]):
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#"> <skos:Concept rdf:about="http://my.example.org/GCL/462#concept"> <skos:prefLabel>Tourism</skos:prefLabel> <skos:broader rdf:resource="http://my.example.org/GCL/616#concept"/> <skos:broader rdf:resource="http://my.example.org/GCL/705#concept"/> </skos:Concept> <skos:Concept rdf:about="http://my.example.org/GCL/616#concept"> <skos:prefLabel>Arts, recreation and travel</skos:prefLabel> </skos:Concept> <skos:Concept rdf:about="http://my.example.org/GCL/705#concept"> <skos:prefLabel>Distribution and service industries</skos:prefLabel> </skos:Concept> </rdf:RDF>
To describe the fact that one concept is 'narrower' in sense than another (i.e. is more specific in scope), do for example (adapted from PACS [ref]):
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#"> <skos:Concept rdf:about="http://my.example.org/PACS/40.#concept"> <skos:prefLabel>ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS</skos:prefLabel> <skos:narrower rdf:resource="http://my.example.org/scheme/concept/PACS41."/> </skos:Concept> <skos:Concept rdf:about="http://my.example.org/PACS/41.#concept"> <skos:prefLabel>Electromagnetism; electron and ion optics</skos:prefLabel> <skos:narrower rdf:resource="http://my.example.org/PACS/41.50.+h#concept"/> </skos:Concept> <skos:Concept rdf:about="http://my.example.org/PACS/41.50.+h#concept"> <skos:prefLabel>X-ray beams and x-ray optics</skos:prefLabel> </skos:Concept> </rdf:RDF>
Note that skos:narrower
and skos:broader
should be implementated as each other's inverse.
Associative Relationships
To describe the fact that one concept is 'related' in sense to another, do for example (adapted from AAT [ref]):
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#"> <skos:Concept rdf:about="http://my.example.org/AAT/300185689#concept"> <skos:prefLabel xml:lang="en">armed conflicts</skos:prefLabel> <skos:related rdf:resource="http://my.example.org/AAT/300230820#concept"/> <skos:related rdf:resource="http://my.example.org/AAT/300055312#concept"/> </skos:Concept> <skos:Concept rdf:about="http://my.example.org/AAT/300230820#concept"> <skos:prefLabel xml:lang="en">jousts</skos:prefLabel> <skos:related rdf:resource="http://my.example.org/AAT/300185689#concept"/> </skos:Concept> <skos:Concept rdf:about="http://my.example.org/AAT/300055312#concept"> <skos:prefLabel xml:lang="en">revolutions</skos:prefLabel> <skos:related rdf:resource="http://my.example.org/AAT/300185689#concept"/> </skos:Concept> </rdf:RDF>
Note that skos:related
should be implementated as a symmetric property.
End section