3.3.9 Predicate properties
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  • Documentation
    • Reference manual
    • Packages
      • SWI-Prolog Semantic Web Library 3.0
        • Two RDF APIs
          • library(semweb/rdf_db): The RDF database
            • Predicate properties
              • rdf_set_predicate/2
              • rdf_predicate_property/2
Availability::- use_module(library(semweb/rdf_db)).
Source[det]rdf_set_predicate(+Predicate, +Property)
Define a property of the predicate. This predicate currently supports the following properties:
symmetric(+Boolean)
Set/unset the predicate as being symmetric. Using symmetric(true) is the same as inverse_of(Predicate), i.e., creating a predicate that is the inverse of itself.
transitive(+Boolean)
Sets the transitive property.
inverse_of(+Predicate2)
Define Predicate as the inverse of Predicate2. An inverse relation is deleted using inverse_of([]).

The transitive property is currently not used. The symmetric and inverse_of properties are considered by rdf_has/3,4 and rdf_reachable/3.

To be done
Maintain these properties based on OWL triples.