Convert the output of xml_to_rdf/3 from library(rdf) into a list of triples of the format described below. The intermediate representation should be regarded a proprietary representation.
rdf(Subject, Predicate, Object).
Where `Subject' is
And `Predicate' is
And `Object' is
Input is the `content' of the RDF element in the format as generated by load_structure(File, Term, [dialect(xmlns)]). rdf_triples/3 can process both individual descriptions as well as the entire content-list of an RDF element. The first mode is suitable when using library(sgml) in `call-back' mode.