- From: Arthur Jennings <arthur.jennings@gmail.com>
- Date: Thu, 14 Feb 2008 01:46:38 -0800
- To: "public-html@w3.org WG" <public-html@w3.org>
- Cc: "Harry Halpin" <hhalpin@ibiblio.org>
- Message-ID: <57580290802140146w2e2403e2ye07e3353b8323a6d@mail.gmail.com>
Back in July, Dan Connolly proposed that the profile attribute be allowed on the head element. As far as I can tell, it still isn't. Was this change rejected, or just lost in the shuffle? If it won't be allowed, is there an alternate way to do <a href=" http://www.w3.org/TR/html401/struct/global.html#h-7.4.4.3">meta data profiles</a>? -- Arthur Jennings On Mon, Jul 9, 2007 at 1:58 PM, Dan Connolly <connolly@w3.org> wrote: > > Hello from the W3C GRDDL Working Group, > > HTML 4 introduced the profile attribute on the head element > a URI-based extension hook. > http://www.w3.org/TR/html4/struct/global.html#h-7.4.4.3 > > The use of this mechanism is not very common, but some > communities have endorsed it explicitly, for example: > > <head profile="http://dublincore.org/documents/dcq-html/"> > <title>Expressing Dublin Core in HTML/XHTML meta and link > elements</title> > > in > Expressing Dublin Core in HTML/XHTML meta and link elements > DCMI Recommendation. 2003-11-30 > http://dublincore.org/documents/dcq-html/ > > > and > > <head profile='http://gmpg.org/xmdp/samplehtmlprofile.html'<http://gmpg.org/xmdp/samplehtmlprofile.html%27> > > > > in > Xhtml Meta Data Profiles (XMDP) > http://gmpg.org/xmdp/description > > > GRDDL is a mechanism for using XML documents, especially XHTML > documents, as Semantic Web data: > > "This GRDDL specification introduces markup based on existing standards > for declaring that an XML document includes data compatible with the > Resource Description Framework (RDF) and for linking to algorithms > (typically represented in XSLT), for extracting this data from the > document." > -- http://www.w3.org/TR/grddl/ > > It lets source documents declare the syntax their written in using > pointers to convert this syntax to the standard RDF/XML syntax. The > pointers can be either direct or indirect, via a namespace document > or HTML profile. > > At least a few web sites are using GRDDL to formalize microformats data > as Semantic Web data: > http://2007.xtech.org/public/schedule/detail/15 > http://www.semantic-conference.com/2007/sessions/r3.html > and there are several interoperable implementations and > a reasonably complete test suite of GRDDL: > http://esw.w3.org/topic/GrddlImplementations > http://www.w3.org/2001/sw/grddl-wg/td/test_results > > The GRDDL use cases document discusses scenarios where consumers > use tools like HTML tidy to use HTML documents as if they were > XML. > http://www.w3.org/TR/grddl-scenarios/#html_tidy_use_case > > While the current scope of GRDDL is limited to XML and XHTML, > it is mostly specified in terms of XPath, and it seems likely > that HTML 5 should work with XPath much the way XHTML does, > so that an HTML 5 parser should take the place of > HTML tidy plus an XML parser. So it looks technically straightforward > to revise GRDDL to work with HTML 5. Several of the implementations > already anticipate such a revision and support HTML documents > that are not well-formed XML by way of a "tag soup" parser. > > The profile attribute on head is noted as one of the > attributes absent from current HTML 5 drafts. > http://www.w3.org/html/wg/html5/diff/#absent-attributes > > We suggest adding it. The specification text in HTML 4 is > adequate in our experience. > http://www.w3.org/TR/html4/struct/global.html#h-7.4.4.3 > > If HTML 5 doesn't preserve this hook from HTML 4 > and XHTML 1, the use of head/@profile will be less > formally ratified, but it seems unlikely to change. > Since implementations already exploit, it > seems likely that authors will continue to use it. > > The cost of (re-)standardizing this markup seems moderate > and less than the value of preserving the current investment > in head/@profile into HTML 5 combined with the benefit > of endorsing this connection between HTML 5 and the > Semantic Web via GRDDL. > > > Dan Connolly and Harry Halpin for the W3C GRDDL Working Group > http://www.w3.org/2001/sw/grddl-wg/ > > > > >
Received on Thursday, 14 February 2008 09:46:58 UTC