rdf_triple.pl -- Create triples from intermediate representation

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

Atom: The subject is a resource
each(URI): URI is the URI of an RDF Bag
prefix(Pattern): Pattern is the prefix of a fully qualified Subject URI

And `Predicate' is

Atom: The predicate is always a resource

And `Object' is

Atom: URI of Object resource
literal(Value): Literal value (Either a single atom or parsed XML data)

rdf_triples(+Term, -Triples) is det
rdf_triples(+Term, -Tridpples, +Tail) is det: Convert an object as parsed by rdf.pl into a list of rdf/3 triples. The identifier of the main object created is returned by rdf_triples/3.
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.
rdf_start_file(+Options, -Cleanup) is det: Initialise for the translation of a file.
rdf_end_file(:Cleanup) is det: Cleanup reaching the end of an RDF file.
anon_prefix(-Prefix) is semidet: If defined, it is the prefix used to generate a blank node.
rdf_reset_ids is det: Utility predicate to reset the gensym counters for the various generated identifiers. This simplifies debugging and matching output with the stored desired output (see rdf_test.pl).