- From: Jim Hendler <hendler@cs.umd.edu>
- Date: Tue, 8 Jun 2004 16:17:09 -0400
- To: public-rdf-dawg@w3.org
- Message-Id: <p06110456bcebccc6eb5f@[10.0.1.2]>
I have now reached the end of the UC&R document and would like to register that I would object (in the sense that if this went to rec I would vote against it as an AC member if it included these words) to 4.6 as written: It should be possible for knowledge encoded in other semantic languages-for example: RDFS, OWL, and SWRL-to affect the results of queries executed against RDF graphs. while I could live with 4.6a It should be possible for a query to indicate that the answers should take into account knowledge encoded in RDF semantic extensions such as RDFS, OWL, etc. This is for two reasons: 1 - mention of SWRL is problematic -- RDFS and OWL are Recommendations that have gone through the full W3C process at great cost to participants and to the W3C. SWRL is just a note w/no WG status. While I like SWRL, and my research group uses it, there's a bunch of other systems out there at the same level of informality, and it isn't fair for us to mention one and not the others (some of which are notes or referenced in notes). Also, adding SWRL confuses rule processing with other kinds of inferencing, and it is not clear to me this is an objective of this WG (in fact, I would point out that it is probably out of scope given section 2.2 of the charter [1]) 2 - the "affect the results of queries" seems to me to be not only imprecise, but misleading -- it doesn't say "enhance" or "improve" so it could simply mean that that stuff can arbitrarily be taken into account in some way -- FWIW, I could achieve what is stated in 4.6 by saying whenever RDFS or OWL is used the query fails -- which means the knowledge has affected the queries. Seriously, I think the second writing, which offers that the SHOULD take into account the knowledge, is much clearer as to what the objective actually is [1] http://www.w3.org/2003/12/swa/dawg-charter#rules -- Professor James Hendler http://www.cs.umd.edu/users/hendler Director, Semantic Web and Agent Technologies 301-405-2696 Maryland Information and Network Dynamics Lab. 301-405-6707 (Fax) Univ of Maryland, College Park, MD 20742 240-277-3388 (Cell)
Received on Tuesday, 8 June 2004 16:21:13 UTC