- From: Dave Beckett <dave.beckett@bristol.ac.uk>
- Date: 2002年1月22日 12:04:30 +0000
- To: Sjoerd Visscher <sjoerd@q42.nl>
- cc: www-rdf-comments@w3.org
- Message-ID: <5161.1011701070@tatooine.ilrt.bris.ac.uk>
>>>Sjoerd Visscher said: > As I wrote in my post last month > http://lists.w3.org/Archives/Public/www-rdf-comments/2001OctDec/0391.html I've replied to the comments you made there just today http://lists.w3.org/Archives/Public/www-rdf-comments/2002JanMar/0019.html so I'll edit out some of your comments here that I answered there. > I found out that PI's and comments weren't allowed in RDF/XML syntax. I > thought that might be a problem with my translation, but I'm now quite > confident that it's not allowed either with the current working draft. See above. <snip/> > It is possible to fix the spec to make it clear that PI's and comments > are allowed in RDF ... I propose to do that > ... . But I think it would be a better idea to put the XML > Core Working Group to work. They should specify how to 'filter out' > information items and properties that you are not interested in, f.e. > how this affects properties like [children]. This can then be used for > all kinds of specs, not just RDF, that use a 'subset' of the Infoset, > while the right procedure for 'subsetting' is never defined. (SGML's > groves had this through grove-plans) Other specifications such as the XQuery 1.0 and XPath 2.0 Data Model (Working Draft 20 December 2001) http://www.w3.org/TR/2001/WD-query-datamodel-20011220/ define their Infoset filtering operation simply: "Other information items and properties made available by the Infoset processor are ignored." -- Appendix A: XML Information Set Conformance http://www.w3.org/TR/2001/WD-query-datamodel-20011220/#d2e4846 So I think if I add some similar note about other items, that should be OK. I don't think we need to invent a new genreal mechanism for filtering Infoset items (SAX events) just now. > Then you can define how RDF filters out PI's and comments, and even > whitespace. Then "ws* (nodeElement ws* )*" can become simply > "nodeElement*"; whitespace is filtered out. That particular example is not something we can do in the existing RDF/XML some whitespace is significant, some isn't. The choice is depends on where you are in the grammar. Dave
Received on Tuesday, 22 January 2002 07:04:32 UTC