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Re: B.2 DTD required or optional?

From: Len Bullard <cbullard@HiWAAY.net>
Date: Mon, 14 Oct 1996 16:30:05 -0500
Message-ID: <3262B0DD.858@HiWAAY.net>
To: Tim Bray <tbray@textuality.com>
CC: W3C SGML Working Group <w3c-sgml-wg@w3.org>
Tim Bray wrote:
> 
> At 03:05 PM 10/12/96 CDT, Michael Sperberg-McQueen wrote:
> 
> >B.2 Should XML require each document instance to have a DTD or not
> >(7.1)?
> 
> One concept is that the XML spec should define two separate characteristics
> that a document can have, well-formedness and validity.
> 
> A. A "Well-Formed XML Document" has
> 
> 1. syntactically distinguishable elements, attributes, comments, and PI's
> 2. one root element
> 3. all elements properly nested within each other
> 4. no text outside the root element
> 
> Such a document may or may not contain markup declarations.  If it does,
> well-formedness also allows
> 
> 5. empty elements, if they're declared
> 6. entity references, if they're declared
> 
> B. A "Valid XML document" means there's a full DTD and it's been validated
>    in the familiar SGML sense.

Why does an XML document require a single root?

len
Received on Monday, 14 October 1996 17:30:38 UTC

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