XML name spaces are identified using a URI. Unfortunately various
URI's are in common use to refer to RDF. The rdf_parser.pl
module therefore defines the namespace as a multifile/1
predicate, that can be extended by the user. For example, to parse the
Netscape
OpenDirectory
structure.rdf file, the following declarations are used:
:- multifile
rdf_parser:rdf_name_space/1.
rdf_parser:rdf_name_space('http://www.w3.org/TR/RDF/').
rdf_parser:rdf_name_space('http://directory.mozilla.org/rdf').
rdf_parser:rdf_name_space('http://dmoz.org/rdf').
The initial definition of this predicate is given below.
rdf_name_space('http://www.w3.org/1999/02/22-rdf-syntax-ns#').
rdf_name_space('http://www.w3.org/TR/REC-rdf-syntax').