3.2 library(semweb/rdf11_containers): RDF 1.1 Containers
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Availability::- use_module(library(semweb/rdf11_containers)).
[nondet]rdfs_nth0(?N, ?Container, ?Elem)
True if rdf(Container, P, Elem) is true and P is the N-th (0-based) container membership property.
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