- From: Michael Schneider <schneid@fzi.de>
- Date: Tue, 27 Nov 2007 21:53:57 +0100
- To: "Owl Dev" <public-owl-dev@w3.org>, "Ian Horrocks" <horrocks@cs.man.ac.uk>, "Jeremy Carroll" <jjc@hpl.hp.com>
- Cc: <bmotik@cs.man.ac.uk>
[Comment to OWL-WG discussion; posted to involved WG-members] Hi, Ian and Jeremy! Just a small speculative comment on Jeremy's idea to use XML comments for representing real semantic-free comments in OWL's RDF syntax: In http://lists.w3.org/Archives/Public/public-owl-wg/2007Nov/0461.html Ian Horrocks answered to Jeremy Carroll: >> More constructively, what I am hearing, I think, is that the >> requirement is for comments that have no semantics and just fit >> into the specification in the right way. >> >> In RDF/XML there has always been the capability to have such >> comments - they look like: >> >> <!-- >> This is a comment, it has no bearing on the formal semantics of >> the document. >> --> >> >> It may be possible to provide say, an informative GRDDL transform >> from an XML version of the axioms, to RDF/XML, and back again, that >> round trips comments appropriately. > > As you probably recall, this was discussed and dismissed in the > WebOnt working group for the reason that it is much too low-level (it > is a feature of XML), and that such comments may be lost when > documents are processed. What you propose w.r.t. GRDDL sounds more > like a hack than a realistic solution. Moreover, this mechanism would > hardly satisfy the requirement to have a more comprehensive framework > that allowed (at least) for annotating axioms as well as entities. What comes to my mind is what's actually missing are "RDF comments", i.e. comments which belong to an RDF graph, but which are not interpreted (all triples within an RDF graph are always interpreted according to RDF semantics). I am thinking about comments for URI resources, data values, bNodes(?), whole triples, and possibly even subgraphs. This would make it possible to really map both entity and axiom annotations in the Functional Syntax to semantic-free comments in RDF. Of course, for every RDF serialization language there would also have to be some specific serialization for comments, but this would be an RDF issue, and would be completely transparent to OWL. Well, as I said, this is a very speculative discussion, because there are no such RDF comments at the moment, and so this does not help us any further in the current situation. But should RDF get its own "RDF-1.1"-WG in some near future, this might be a new feature to be considered. And then, perhaps, already the next OWL-WG could use this new feature for creating a proper RDF-mapping of real semantic-free comments (and perhaps deprecate the annotation mapping which comes out from the current WG :-)). Ah, and please don't ask me about any technical details of such an RDF comment feature! All the comments in this post were just... speculative. ;-) Cheers, Michael -- Dipl.-Inform. Michael Schneider FZI Forschungszentrum Informatik Karlsruhe Abtl. Information Process Engineering (IPE) Tel : +49-721-9654-726 Fax : +49-721-9654-727 Email: Michael.Schneider@fzi.de Web : http://www.fzi.de/ipe/eng/mitarbeiter.php?id=555 FZI Forschungszentrum Informatik an der Universität Karlsruhe Haid-und-Neu-Str. 10-14, D-76131 Karlsruhe Tel.: +49-721-9654-0, Fax: +49-721-9654-959 Stiftung des bürgerlichen Rechts Az: 14-0563.1 Regierungspräsidium Karlsruhe Vorstand: Rüdiger Dillmann, Michael Flor, Jivka Ovtcharova, Rudi Studer Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus
Received on Tuesday, 27 November 2007 20:54:23 UTC