- From: Shane McCarron <shane@aptest.com>
- Date: Thu, 03 Sep 2009 10:09:06 -0500
- To: Henri Sivonen <hsivonen@iki.fi>
- CC: Anne van Kesteren <annevk@opera.com>, Mark Birbeck <mark.birbeck@webbackplane.com>, Manu Sporny <msporny@digitalbazaar.com>, HTML WG <public-html@w3.org>, RDFa Developers <public-rdf-in-xhtml-tf@w3.org>
Henri Sivonen wrote: > On Sep 3, 2009, at 15:06, Anne van Kesteren wrote: > >> Treating xmlns as any other attribute seems like a violation of the >> architecture of Namespaces in XML to me. I.e. a layering violation. > > > Indeed, namespace declarations in XML don't appear in the [attributes] > property of an element information item in the Infoset. They appear in > the [namespace attributes] property and also affect the [in-scope > namespaces] property. > > See http://www.w3.org/TR/xml-infoset/#infoitem.element > > It's highly unusual at the W3C to layer a spec (other than Namespaces > itself of course) directly on top of XML 1.0 instead of layering it on > top of XML + Namespaces (or the Infoset). > Well... The specification under review doesn't say ANYTHING about layering. What Mark (and others) have pointed out is that there are a couple of ways to implement this. If you want to implement an RDFa processor such that it is truly namespace aware, discovering the namespace prefix mappings via [in-scope namespaces] property... you are certainly free to do so. I have yet to find a DOM implementation I can get to in Perl that makes this easy to do (my RDFa processor is written in Perl). So, in my implementation, I have violated the namespace layer. However, the RDFa specification doesn't say I have to. Its just a technique that someone could use. And many of us have. And it works. -- Shane P. McCarron Phone: +1 763 786-8160 x120 Managing Director Fax: +1 763 786-8180 ApTest Minnesota Inet: shane@aptest.com
Received on Thursday, 3 September 2009 15:10:33 UTC