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[Fwd: Quick glance through xhtml2 meatainformation module]

From: Dominique HazaŽl-Massieux <dom@w3.org>
Date: Wed, 08 Sep 2004 15:04:52 +0200
To: www-html-editor@w3.org
Message-Id: <1094648692.5545.95.camel@stratustier>
I had hope I would have more time to formalize these comments, but since
that doesn't look likely, I guess having them in this form is better
than not having them at all.

-----Message transfťrť-----
> From: Dominique HazaŽl-Massieux <dom@w3.org>
> To: public-rdf-in-xhtml-tf@w3.org
> Subject: Quick glance through xhtml2 meatainformation module
> Date: Fri, 06 Aug 2004 11:33:20 +0200
> I glanced quickly through the XHTML 2 meta-information module [1], and
> even more quickly through the XHTML 2 meatainformation attributes module
> [2]; I'm posting my comments here, since I haven't had time to
> investigate them enough to post formal comments to the HTML WG [I'm
> leaving in vacation in a few minutes :) ] but I hope this may help other
> people doing so.
> Overall, it looks really good and well-thought; the issues I spotted
> while glancing through it:
> - there is no way to distinguish between string literals and XML
> literals within the <meta /> element, since they appear to be both (!)
> the default content model of <meta />; I guess this could be solved by
> requiring that the datatype attribute be set for one or the other (the
> metainformation attributes modules says that datatype defaults to
> "xs:string"; I think this makes the case that it can't be an xml literal
> in that case)
> - the introduction to datatype mentions the need of setting the unit of
> a height property, but doesn't explain how to do so afterward; IIRC,
> this strongly relates to another TF topic of the SWBPDWG 
> - the absence of reference to RDF could be damaging; e.g., as of today
> the use of a particular property is not constrained to refer to a given
> schema language (and indeed, not to RDF, OWL, ...), which may makes the
> RDF-ization of an XHTML document impossible if people were to start
> using random other properties list [ I guess this relates to their
> highlighted issue "We need to codify the mechanism for mapping prefixes
> to namespaces for meta data profiles." ]
> - the QName model for the "rel" (and "rev") property doesn't make clear
> how a prefixed name should be interpreted; I guess one way to alleviate
> this would be to reserve non-prefixed names to those defined further
> below (ŗ la "alternate", ...)
> - of interest, the "rev" attribute (inverse to "rel") introduces the
> possibility of expressing syntactically an inverse property, the same
> way you can do in N3 with the "is <property> of" construction; note that
> RDF/XML doesn't have such a construction AFAIK
> - since both <meta> and <link> support the common attributes modules
> (Core, Events, I18N, Bi-directional, Edit, Embedding, Map,
> Metainformation, and Hypertext described in [3]), it would be worth
> reviewing them very carefully to see how/whether these attributes would
> affect their interpretation; xml:lang and its history with RDF/XML is
> probably worth a very close look, as may be hypertext/embedding
> I think it would really be worth spending some time writing a few of the
> RDF/XML test cases in XHTML to detect inconsistencies/incompatibilities;
> I unfortunately don't have the time to do it for now.
> Hope this still helps a bit,
> Dom
> 1.
> http://www.w3.org/TR/2004/WD-xhtml2-20040722/mod-meta.html#s_metamodule
> 2. http://www.w3.org/TR/2004/WD-xhtml2-20040722/mod-metaAttributes.html
> 3.
> http://www.w3.org/TR/2004/WD-xhtml2-20040722/mod-attribute-collections.html
Dominique HazaŽl-Massieux - http://www.w3.org/People/Dom/

Received on Wednesday, 8 September 2004 13:04:59 UTC

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