URI Factory
Provide an implementation for the URI class.
A factory that allows registering an implementation for the URI
class to override the simple internal one (#raptor_uri are char*).
Normally used by redland to replace #raptor_uri with #librdf_uri
@context:
@uri_string:
@Returns:
@context:
@uri:
@local_name:
@Returns:
@context:
@base_uri:
@uri_string:
@Returns:
@context:
@name:
@Returns:
@context:
@uri:
@context:
@uri1:
@uri2:
@Returns:
@context:
@uri:
@Returns:
@context:
@uri1:
@uri2:
@Returns: