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Re: WD-html-in-xml body declaration

From: Chris Maden <crism@oreilly.com>
Date: Mon, 4 Jan 1999 12:23:54 -0500 (EST)
Message-Id: <199901041723.MAA12030@ruby.ora.com>
To: www-html@w3.org
[Ghadi Shayban]
> In HTML 4.0, the body element couldn't have character data directly
> inside of it.

HTML 4.0 defined *three* DTDs: strict, transitional, and frameset.
The transitional DTD allows text in <body>; the strict DTD does not.
HTML 3.2 allowed text in <body>; HTML 2.0 had variable entity
declarations depending on whether %HTML.Recommended; was INCLUDE or
IGNORE.

> In WD-html-in-xml, these pieces of the DTD define the body element:
> <!ENTITY % Block "(#PCDATA | %block; | %misc;)*">
> <!ENTITY % body.content "%Block;">
> <!ELEMENT body %body.content;>
> 
> That states that the body element can have cdata directly inside.
> This seems like a significant change from HTML 4.  Can someone
> enlighten me on this?

It does seem silly to spend time making an XML version of the
transitional DTD.  XML doesn't permit the laxity of most HTML
implementations, so I don't see much point.

> There is also an error, I think.  Shouldn't the body declaration
> be............
> <!ELEMENT body "&body.content;"> ?

No.  General entity references (&...;) aren't recognized in a DTD, so
your content model would be "&body.content;", which isn't legal.  And
the quotes aren't legal there either, even with a parameter entity
reference (%...;); you'd have

<!ELEMENT body "(#PCDATA...)*">

after expansion and quotes aren't legal in a content model.

The percent signs in the entity declarations above indicate that
they're parameter entities, so percent signs must be used in the
references to them, not ampersands.

-Chris
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Received on Tuesday, 5 January 1999 04:39:23 GMT

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