On 9/7/09 18:28, publicay...@verizon.net wrote:
I need to associate a triple with its reification id, then make triples on that id (for things like creator and created). The only way I can figure out to do this in RDFa is to make the triple in the usual way (with about/rel/resource), but also assert the reification triples on the subject, predicate, and object. I was planning on putting the reification triples in the head.
RDF's subject/predicate/object reification mechanism is pretty awkward to use.
If you can find a way to associate creator/date/etc another way, I recommend doing so. How about providing them as metadata about the document that carries the RDF?
It seems unfortunate to add 3 triples and their elements in the head for each triple in the body just to represent the mapping from reification id to a triple's subject, predicate, and object. The only other option I can come up with is to extend RDFa with a new attribute to give the reification id and have it expand into the 3 triples, something like <meta about="s" rel="p" resource="o" reification="id" /> Since there isn't any special handling for reification in RDFa, I was wondering if it was discussed and rejected, and if so, what were the problems. Also, is there any inclination to expand RDFa sometime in the future for convenient handling of reification?
I wouldn't encourage this. Instead, I'd rather see work on documenting deployment patterns that use named graphs, and integration with SPARQL's named graph mechanism.
cheers, Dan
