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can't make sense of modularization conformance section

From: Dan Connolly <connolly@w3.org>
Date: Thu, 06 Jul 2000 09:51:15 -0500
Message-ID: <39649CE3.7911349E@w3.org>
To: www-html-editor@w3.org
I'm trying to figure out the conformance section of
Modularization of XHTML
http://www.w3.org/TR/2000/WD-xhtml-modularization-20000105/

It says:

	The document type must be defined using one of the implementation
	methods defined by the W3C (currently this is limited to XML DTDs,
	but XML Schema will be available soon). 

	--
http://www.w3.org/TR/2000/WD-xhtml-modularization-20000105/conformance.html#s_conform


but I'm not sure what a document type is; but then I see:

	document type 
		a class of documents sharing a common abstract structure.
		The ISO 8879 [SGML] definition is as follows: "a class of
		documents having similar characteristics; for example,
		journal, article, technical manual, or memo. (4.102)" 

	--
http://www.w3.org/TR/2000/WD-xhtml-modularization-20000105/terms.html#a_terms

so I see that a document type is a class (i.e. a set) of documents.

But then the conformance section continues:

	3.The document type must include, at a minimum, the Structure,
	Hypertext, Basic Text, and List modules defined in this specification. 

What does that mean? i.e. what does it mean for a document type
(a set of documents) to include a module? Module seems to be
informally defined:

	module 
		an abstract unit within a document model expressed as
		a DTD fragment, used to consolidate markup declarations to
		increase the flexibility, modifiability, reuse and
		understanding of specific logical or semantic structures. 

But I don't see how to make sense of item 3 above.

Please see:

	The essentials of a specification
	http://www.w3.org/1999/09/specification
	Tim BL Oct 1999

I note that my earlier review comments are still unanswered:

identify XHTML DTD by URI, not by FPI Dan Connolly (Thu, Feb 10 2000) 
http://lists.w3.org/Archives/Public/www-html-editor/2000JanMar/0101.html

"validate against"??? Dan Connolly (Thu, Feb 10 2000) 
http://lists.w3.org/Archives/Public/www-html-editor/2000JanMar/0100.html

Please take that comment about URIs vs. FPIs to apply to
the modularization naming rules as well:

http://www.w3.org/TR/2000/WD-xhtml-modularization-20000105/conformance.html#s_conform_naming_rules

-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/
Received on Thursday, 6 July 2000 10:51:27 GMT

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