- From: Gregg Kellogg <gregg@greggkellogg.net>
- Date: Wed, 25 Apr 2012 18:42:17 -0400
- To: Alex Milowski <alex@milowski.com>
- CC: RDFa WG <public-rdfa-wg@w3.org>
On Apr 25, 2012, at 2:50 PM, Alex Milowski wrote: > On Wed, Apr 25, 2012 at 1:50 PM, Gregg Kellogg <gregg@greggkellogg.net> wrote: >> >> The thing is that @rel remains a valid RDFa 1.1 property (not RDFa 1.1 Lite conformant, but a conforming processor MUST process @rel). Adding a rule, specifically for HTML+RDFa 1.1 (which includes both HTML5 and XHTML5), that removes these "junk" link relations from consideration solves the problem for the typical junk link relation terms. >> > > As specified, I fail to see how the current HTML+RDFa 1.1 document > indicates any handling of documents served with the media type > application/xhtml+xml. If all you have is the content-type header and > the XML (XHTML) document, how exactly do you choose between XHTML+RDFa > 1.1 and HTML+RDFa 1.1 ? If that was well-defined and rational to use, > that would go a long way in making this easier to use. It's even worse. Given text/html, how to you decode for microdata, HTML+RDFa or Turtle+RDFa (yes, it exists [1]). The fact is, you either need to decode against all formats, or have some a-priori knowledge to pick the proper processors. application/xhtml+xml adds in the possibility of XHTML+RDFa 1.0 and XHTML+RDFa 1.1, for which other indicators (DOCTYPE, @version) need to be used. The HTML+RDFa doc does need to clarify that it is applied to text/html as well as application/xhtml+xml, but I think this is implied by piggy-backing on the HTML spec, which already indicates that supports both mime types. Note that microdata doesn't go out of it's way to say it supports both text/html and application/xhtml+xml either, as it's assumed from the HTML spec. I would clarify the HTML+RDFa 1.1 spec User Agent Conformance with something like the following: [[[ HTML+RDFa documents should be labeled with Internet Media Types "text/html" or "application/xhtml+xml" as defined in [RFC3236]. ]]] There should also be an indication that XHTML mode HTML+RDFa 1.1 documents can be distinguished from XHTML+RDFa 1.1 documents by the lack of an XHTML DOCTYPE or @version. I created ISSUE-137 to track this on your behalf. Gregg [1] http://dvcs.w3.org/hg/rdf/raw-file/default/rdf-turtle/index.html#in-html > -- > --Alex Milowski > "The excellence of grammar as a guide is proportional to the paucity of the > inflexions, i.e. to the degree of analysis effected by the language > considered." > > Bertrand Russell in a footnote of Principles of Mathematics >
Received on Wednesday, 25 April 2012 22:43:10 UTC