- From: John Cowan <cowan@ccil.org>
- Date: Mon, 4 May 2009 16:27:01 -0400
- To: "Grosso, Paul" <pgrosso@ptc.com>
- Cc: public-xml-core-wg@w3.org
Grosso, Paul scripsit: > > Richard, Norm, DV, John, HT had a vigorous discussion during > > our telcon of April 22 that we did not complete. We will need > > to continue this in email. > > I see no reason to discuss this again this week unless we have > had some prior discussion in email. Well, okay, I'll try to give a precis of what I said, or what I think I said. The problematic sentence is: A document that uses xml:id attributes that have a declared type other than xs:ID will always generate xml:id errors. I understand "declared type" in this context to mean "declared in a RELAX NG schema". If it refers solely to DTD declaration, then the sentence is out of place and should be removed anyway. Case I: xml:id processing is done before RELAX NG processing. In this case, the xml:id processor has no access to the RELAX NG schema, since RELAX NG processing has not yet been performed, and therefore cannot report an xml:id error based on the sentence above. By policy, RELAX NG processors ignore attribute-type information in the incoming infoset and use only the attribute type declarations in the schema. Therefore, the RELAX NG processor is not in a position to report that an xml:id attribute has some other declared type, because xml:id is not special to RELAX NG processors (nor is any other attribute or element). Case II: RELAX NG processing is done before xml:id processing. In this case, the RELAX NG processor knows the declared type of any xml:id attributes. But since xml:id is not special to RELAX NG, it will not complain if the declared type is something other than xsd:ID. The xml:id processor does *not* know the declared type, because RELAX NG does not augment the incoming infoset other than to add a global validity indication for the whole document. So the xml:id processor also cannot report an xml:id error. In both cases, then, there is nobody in a position to report the conflict, and thus it's inappropriate to have a sentence which says something will be done, when in fact it will not be done. Okay, Henry, go ahead and pick this apart. -- Long-short-short, long-short-short / Dactyls in dimeter, John Cowan Verse form with choriambs / (Masculine rhyme): cowan@ccil.org One sentence (two stanzas) / Hexasyllabically Challenges poets who / Don't have the time. --robison who's at texas dot net
Received on Monday, 4 May 2009 20:27:36 UTC