- From: <Patrick.Stickler@nokia.com>
- Date: Thu, 29 Nov 2001 12:57:07 +0200
- To: Jan.Grant@bristol.ac.uk, connolly@w3.org
- Cc: w3c-rdfcore-wg@w3.org
> I'd rather see P++/U' than P/U (where U' doesn't actually do gnarly > things with URIs, but still has the low-level typed data of U). Firstly, let's leave U out of the main discussion for now, as I consider it just a synonym of P or DAML. It is just a tighter binding of the lexical form and data type identifier than these other two idioms, and the benefits are primarily practical (greater number of nodes can participate in tidying operations, so we get a higher level of compression). Secondly, I also like the P++ approach the most, but unfortunately, I think it needs to be left as a future goal to work towards in e.g. RDF 2.0. I think it is logical to be able to treat literal nodes as subjects, but to allow that now would (IMO) be as much of a radical change as the S proposal. However, I think that the P/DAML approach is much more compatible with a future P++ treatment and really constitutes simply moving the literal value of the rdf:value property of the bNode to the bNode itself as a label. Thus, it's nearly a synonym to P/DAML/U itself. I.e. from x --ex:prop--> _:1 --rdf:value--> "10" | -----rdf:type---> xsd:integer to x --ex:prop--> _:1:"10" --rdf:type--> xsd:integer One could almost view U as a precursor to P++, e.g. compare the following to the P++ immiediately above: x --ex:prop--> <xsd:integer:10> --rdf:type--> xsd:integer Thus, while P/DAML/U and P++ are all very closely aligned in "philosophy", the S proposal is quite different -- though I'm not saying that S is less attractive simply because it is different, but rather that the similarity of all the other proposals suggests a common perception of how data typing should work that is at odds with the S "world view". I see adoption/clarification of the P/DAML idioms as a logical step towards a future P++ like solution -- and the move from P/DAML to P++ is quite small IMO compared to a move from S to P++. Cheers, Patrick -- Patrick Stickler Phone: +358 50 483 9453 Senior Research Scientist Fax: +358 7180 35409 Nokia Research Center Email: patrick.stickler@nokia.com
Received on Thursday, 29 November 2001 05:57:48 UTC