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Re: XHTML2 MIME type

From: Henri Sivonen <hsivonen@iki.fi>
Date: Sun, 18 May 2003 13:25:08 +0300
To: www-html@w3.org
Message-Id: <FFFE298C-891A-11D7-80D6-003065B8CF0E@iki.fi>

On Friday, May 16, 2003, at 23:43 Europe/Helsinki, David Woolley wrote:

>> Not supporting character entities in XHTML is not a bug in Opera if
>> 1) XHTML is an application of XML
>> and
>> 2) XHTML user agents aren't required to use validating XML processors.
>
> I can't believe that the designers of XML intended this interpretation.

See
http://www.w3.org/TR/REC-xml#wf-entdeclared
http://www.w3.org/TR/REC-xml#vc-entdeclared
http://www.w3.org/TR/REC-xml#include-if-valid

> If they did, they polluted the specification with significant details
> about an essentially useless feature, named entities.

If you think they are useless, would you accept not declaring any 
character entities in the presumably upcoming XHTML 2 DTD?

> I think it much more likely that the intention was that tools for
> particular applications should know the entities referenced from the
> official DTD (etc.),

The internal entity names aren't for the application to know. The XML 
processor deals with expanding internal entity references. And the spec 
authors even addressed the issue of "Entity Declared" in the spec.

> as well as knowing semantic information (e.g.
> section and h allowing an XHTL 2 browser to display the document
> outline tree).

Knowing about the semantics of particular elements is different from 
having prior knowledge of particular internal entities. Expanding the 
internal entity references happens at the XML processor level and the 
XML spec defines how the XML processor finds out about the entity 
values, but doing something useful with the elements happens at the 
application level and how the application gets the rules on what to do 
with particular elements or what the elements mean is outside the scope 
of the XML spec.

-- 
Henri Sivonen
hsivonen@iki.fi
http://www.iki.fi/hsivonen/
Received on Sunday, 18 May 2003 06:25:20 GMT

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