Henri Sivonen wrote: > On Feb 16, 2009, at 11:20, Ivan Herman wrote: > >> I would like to have one point of clarification, if I may... >> >> Henri Sivonen wrote: >> [snip] >>> >>> This problem can be addressed by using absolute URIs instead of CURIEs >>> and phasing out CURIEs by declaring xmlns:http="http:" on the XML side >>> during the transition. (If that makes the predicates annoyingly long, >>> what you have is a fundamental problem with the idea of using URIs as >>> identifiers as opposed to using them for application-level addressing on >>> the Internet. In that case, you should address that problem directly on >>> the level of the RDF model instead of trying to push the annoyance >>> around syntactically.) >>> >>> If you wish to get new features added to HTML5 and the proposed syntax >>> depends on element or attribute names that contain the colon (xmlns:foo >>> in this case), you are just asking for trouble because the colon is >>> special in XML but not in text/html (and if you ask making it special in >>> text/html, too, you are asking more than just adding a few attributes). >>> >> >> Your approach is to phase out CURIE-s altogether on technical grounds. >> However, isn't it correct that those issues disappear if the current >> @xmlns:ABCD mechanism is exchanged against a @prefix="ABCD=blabla" >> approach? > > Yes, the DOM Consistency issue would disappear if, and only if, also the > XHTML side used @prefix instead of @xmlns:ADCD. > Thank you. That what I thought. > (It would leave the problem that prefix-based indirection in itself > confuses people--sometimes in bug-inducing ways. See for example: > http://lists.xml.org/archives/xml-dev/200502/msg00306.html > http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6475032 > http://dev.ctor.org/soap4r/ticket/179 > http://sourceforge.net/tracker/?func=detail&atid=454391&aid=924041&group_id=48863 > ) Yes, I know that this issue was raised before (by you and maybe some others in the list that I do not remember). But I just want to make it clear that, technically speaking, completely phasing out CURIE-s is not a _requirement_ to overcome the technical issues, because @prefix might also do the trick. Note that the RDFa group is looking at the issue of @prefix. Also, some of the implementations (including software running the RDFa distiller[1], though that is not a browser side tool) already implements some form of @prefix, although not widely announced because there is no agreement on the exact syntax yet. Thanks Ivan [1]http://www.w3.org/2007/08/pyRdfa/ > -- Ivan Herman, W3C Semantic Web Activity Lead Home: http://www.w3.org/People/Ivan/ mobile: +31-641044153 PGP Key: http://www.ivan-herman.net/pgpkey.html FOAF: http://www.ivan-herman.net/foaf.rdf
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