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: