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   Re: [xml-dev] Mixed content problem

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In article <EC2C7B699FF2A64D91DBA742E10DA2D73EA977@exchange-svr.acv.apexcovantage.com> you write:

>I'm having trouble with the following content model in a DTD:

> <!ELEMENT metanote
>  ((#PCDATA|emph|meta-received|meta-accepted|meta-revised|
>    meta-presented|meta-submit|edcode|techeditor) |
>   (symposium?,contribgrp?))*>

>This seems to follow all the XML mixed content rules, but I'm still
>getting a parsing error. Can anyone explain, or help with a workaround?

A mixed content declaration in XML must consist of a starred choice
of #PCDATA and a number of element names (or just be (#PCDATA)).  You're
not allowed to put in something like (symposium?,contribgrp?).

In any case, even if it were legal, it would allow exactly the same 
content as:

 <!ELEMENT metanote

See http://www.w3.org/TR/REC-xml/#sec-mixed-content

-- Richard


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