From STLab

Legenda of properties tables

Tables in question

• Jamendo
• LinkedMDB

Fields

• predicate
  • the predicate in question
• #triples
  • the number of triples with the predicate in question
• universe
  • the cartesian product of the domains and ranges of the predicate (domain/range := set of types of subjects/objects of triples with the predicate in question)
• domain %
  • the proportion of triples that are of the type shown in the field 'domain' (see NB below)
• range %
  • the proportion of triples that are of the type shown in the field 'domain' (see NB below)
• mapped to
  • if the property in question could be mapped to an external data-set/ontology, eg DBPedia or ODP
• comments
  • any kind of useful comments about the property or the corresponding universe

NB: the fields 'domain %' and 'range %' correspond to the proportion of triples that are of the type shown in the field 'domain' and 'range' respectively. For example, in Jamendo from the 51K triples that have dc:title as the property, 88.8% have a subject of type mo:'Track'. These statistics also show that 100% of the triples which have foaf:made as the property property in LinkedMDB have two types: linkedmdb:director and foaf:'Person'. This is a strong indication that linkedmdb:director and foaf:'Person' are semantically equal. Using instance-based ontology aligning methods this semantic similarity can be measured automatically using the Jaccard coefficient.