DTD Question

david at megginson.com david at megginson.com
Sat Oct 17 15:15:27 BST 1998

Samuel R. Blackburn writes:

 > I just attended a briefing about XML. One of the things
 > that struck me was, if I understand the presenter, DTD
 > thinks the world is flat. Is it possible for DTD to describe
 > elements of the same name but have different meaning?
 > Consider the following:
 > <NAME>
 >   <FIRST>Sam</FIRST>
 >   <LAST>Blackburn</LAST>
 > </NAME>
 > <ROUTE>
 >    <FIRST>99.409</FIRST>
 >    <LAST>2091.7785</LAST>
 > </ROUTE>
 > Is it possible in DTD to say that NAME.FIRST is a string
 > and ROUTE.FIRST is a number?

It's not possible for the DTD to say anything about character-data,
except that it's allowed or forbidden.  Data typing is not part of XML 
1.0 DTDs (though there is some very crude typing for attribute

All the best,


David Megginson                 david at megginson.com

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