Data Model

This page documents the RDF constructs, including but not limited to SKOS, that Skosmos supports. In general, Skosmos should work with any well-formed SKOS Core vocabularies.

It is recommended use Skosify to pre-process your SKOS vocabulary and fix potential problems before publishing it in Skosmos.

Concepts

All instances of skos:Concept are displayed as concepts in Skosmos. Each concept will have its own page and concepts can be searched for (via their labels).

Labels

Skosmos supports the following label properties:

• skos:prefLabel is used as preferred label, usually set in bold
• skos:altLabel: can be found in search, usually set in italic
• skos:hiddenLabel: can be found in search, but not displayed

Make sure that you have proper language tags for all labels.

Semantic relationships

• skos:broader and skos:narrower are used for e.g. the hierarchy display
• skos:related is displayed as links between concepts

Mapping relationships

Skosmos recognizes all SKOS mapping relationships

• skos:exactMatch
• skos:closeMatch
• skos:broadMatch
• skos:narrowMatch
• skos:relatedMatch see issue 165
• owl:sameAs

Documentary notes

• skos:note
• skos:scopeNote
• skos:definition
• skos:example: not implemented, see issue #164
• skos:historyNote: not implemented, see issue #164
• skos:editorialNote: not implemented, see issue #164
• skos:changeNote: not implemented, see issue #164

Dublin Core properties

Both the old DC 1.1 (namespace prefix dc11) and the newer DC Terms (prefix dc) namespaces are supported.

• dc:title and dc11:title
• dc:subject
• dc:description and dc11:description
• dc:creator and dc11:creator
• dc:contributor and dc11:contributor
• dc:rigts and dc11:rights
• dc:license and dc11:license
• dc:publisher and dc11:publisher
• dc:source and dc11:source
• dc:date
• dc:created
• dc:issued
• dc:modified
• dc:relation and dc11:relation
• dc:replaces
• dc:isReplacedBy

Other properties

• rdfs:label
• rdfs:comment
• owl:versionInfo
• foaf:homepage
• skosext:partOf

Types of concepts

You can define custom types of concepts, i.e. subclasses of skos:Concept, in your RDF data. The type will be displayed by Skosmos and you can also restrict searches by type.

Make sure to also set a label for each type. Also make sure that instances of those subclasses are also typed as skos:Concept, as Skosmos by itself will not perform any inference (Skosify with the --infer option can be used for this).

Example:

ex:Place a owl:Class ;
  rdfs:subClassOf skos:Concept ;
  rdfs:label "Place"@en .

ex:new_york a ex:Place, skos:Concept ;
  skos:prefLabel "New York"@en .

ex:paris a ex:Place, skos:Concept ;
  skos:prefLabel "Paris"@en .

Concept schemes

Collections, Arrays and Groups