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Re: [xml-dev] DTD ( From Eliotte Rust Harold's Book)
- From: Elliotte Rusty Harold <elharo@metalab.unc.edu>
- To: xml-dev <xml-dev@lists.xml.org>
- Date: Thu, 27 Sep 2001 07:47:08 -0400
At 11:16 AM +0100 9/27/01, Rob Lugt wrote:
>From: "Martin Gudgin" <marting@develop.com>
>
>> You could also do this
>>
>> <!ELEMENT DIVISION (TEAM,TEAM,TEAM,TEAM,TEAM?,TEAM?) >
>>
>
>Not if your processor correctly disallows non-deterministic content models.
>However, the same expression can be written deterministically like this:-
>
><!ELEMENT DIVISION (TEAM,TEAM,TEAM,TEAM,(TEAM,TEAM?)?) >
>
I disagree. <!ELEMENT DIVISION (TEAM,TEAM,TEAM,TEAM,TEAM?,TEAM?) > is legal in XML. No conforming validating XML parser will reject this form. A few may choose to issue a warning for compatibility with some older SGML parsers, and for compatibility you may choose to write the constraint in the form <!ELEMENT DIVISION (TEAM,TEAM,TEAM,TEAM,(TEAM,TEAM?)?) >. However you are by no means required to do so. Non-deterministic content models of this nature are legal in XML.
--
+-----------------------+------------------------+-------------------+
| Elliotte Rusty Harold | elharo@metalab.unc.edu | Writer/Programmer |
+-----------------------+------------------------+-------------------+
| The XML Bible, 2nd Edition (Hungry Minds, 2001) |
| http://www.ibiblio.org/xml/books/bible2/ |
| http://www.amazon.com/exec/obidos/ISBN=0764547607/cafeaulaitA/ |
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