Re: Why this restriction? (was Constraining a "mixed" mixed co
In article <1126536990.29765.242713147@w...> you write: >Now, to comment on your reply, which does seem to be right (where in >the XML 1.0 spec does it specifically say DTDs are not allowed to >constrain as I'd like it to?) http://www.w3.org/TR/REC-xml/#sec-mixed-content >From a philosophical perspective, I find it sort of perplexing why >there is this seeming limitation imposed upon DTDs. It's a consequence of XML being a simplified subset of SGML. >It would seem, in the case I ask about, that a future version of XML >could easily, and without breaking current XML documents and DTDs, >give DTDs greater power at specifying constraints. There is unlikely ever to be a future version of XML that changes DTDs. No-one wants to work on such a specification, and no-one wants to implement it. A more likely change (though still unlikely I think) is the complete removal of DTDs. If you want to constrain the content of your XML documents in ways that DTDs don't support, consider the various schema tools. -- Richard
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