DTD Question

[david at megginson.com]

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
values).


All the best,


David

-- 
David Megginson                 david at megginson.com
           http://www.megginson.com/

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