Availability:
:- use_module(library(semweb/rdf11)).
rdf:first
and rdf:rest
property and the list ends in rdf:nil
.
If RDFTerm is unbound, RDFTerm is bound to each maximal
RDF list. An RDF list is maximal if there is no triple rdf(_, rdf:rest, RDFList)
.