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Re: Date and time attribute type in conforming XHTML and valid HTML

From: <Wolfgang.Frech@xenium.de>
Date: Mon, 6 Sep 2004 16:21:33 +0200
To: Ian Hickson <ian@hixie.ch>
Cc: www-validator@w3.org
Message-ID: <OF6E188E6B.1DC25D64-ONC1256F07.0048CECD@XENIUM.ag>

> Note that XHTML references HTML and thus this applies
> to XHTML as well.

If it is generally understood that the XHTML rec references
the HTML spec in a way that includes the HTML attribute type
constraints into the XHTML conformance definition, than all is
well and clear. But does it?

Exactly this is my problem: As far as I know, the XHTML rec,
does _not_ reference the HTML spec normatively, but only
informatively.  To be more specific, these are the candidates
that could be seen as references to the HTML spec:

"the semantics[!] of the [...] attributes are defined in the W3C
Recommendation for HTML 4" (Abstract)
Nothing on validity or attribute types.

"[a stricly conforming document] must conform to the constraints
expressed in one of  the three DTDs found in DTDs and in Appendix B."
(3.1.1 Strictly Conforming Documents, item 1)
The other 4 items deal with root element, namespace and DTD element,
but not with attribute types.

In the DTDs, same result for all three kinds:
"This is the same as HTML 4 Strict [,...]
(XTHML 1.0 Strict DTD, first comment block)
ThÝs is a statement on the difference between DTDs (XML/SGML)
not on the languages (XHTML/HTML).

In Appendix B: nothing on attributes, only element nesting.

In Appendex E, References: only informative refs, including to the
HTML spec

In short: The XHTML rec does _not_ reference the attribute type
constraints or any other validity constraints of the HTML

Please correct me.
Received on Monday, 6 September 2004 14:20:25 UTC

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