Notes on RDF application framework (from IRC) "the semantics behind the assignment of numbered container-membership properties (ie. rdf:_n) to members of RDF containers (Seq, Alt, Bag) is application specific. Generic RDF processors should make no assumptions about continuity of these numbered properties (eg. rdf_1, rdf_2, rdf_34223 is a reasonable sequence). While some RDF application contexts may support or employ automatic renumbering of these container properties, other applications are likely to employ 'gappy' sequences of numbered container membership properties (eg. to maintain a correlation with another sequence elsewhere, such as street numbers). RDF processors should not make closed-world assumptions about container membership (ie. a description of a Bag/Seq/Alt might well provide only a partial unumeration of its members). RDF processors can make use of additional information provided in RDF to understand more accuraately the semantics associated with particular uses of the basic RDF container constructs."