3.2.2 Enumerating objects
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Availability::- use_module(library(semweb/rdf_db)).
Source[nondet]rdf_current_predicate(?Predicate)
True when Predicate is a currently known predicate. Predicates are created if a triples is created that uses this predicate or a property of the predicate is set using rdf_set_predicate/2. The predicate may (no longer) have triples associated with it.

Note that resources that have rdf:type rdf:Property are not automatically included in the result-set of this predicate, while all resources that appear as the second argument of a triple are included.

See also
rdf_predicate_property/2.
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