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Availability::- use_module(library(semweb/rdf11_containers)).
[nondet]rdfs_member(?Elem, ?Container)
True if rdf(Container, P, Elem) is true and P is a container membership property.
Availability::- use_module(library(semweb/rdfs)).
rdfs_member(?Resource, +Set)
Test or generate the members of Set. Set is either an individual of rdf:List or rdfs:Container.