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   RE: DTD question

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  • From: David Megginson <david@megginson.com>
  • To: "XML Developers' List" <xml-dev@ic.ac.uk>
  • Date: Mon, 26 Jul 1999 21:03:40 -0400 (EDT)

DuCharme, Robert writes:

 > > Is the following correct?
 > > <!ELEMENT TYPE_OF_LOSS_CODE EMPTY>
 > > <!ATTLIST TYPE_OF_LOSS_CODE >
 > 
 > It is correct, but your second line is basically saying "here comes some
 > attribute definitions for the TYPE_OF_LOSS_CODE element type," and then it
 > doesn't have any. This is legal (see production 52 of the XML spec), and
 > would typically be used as a placeholder for where you're going to put the
 > attribute definitions, but wouldn't serve much purpose that I know of in a
 > production system. 

It's very useful in a system that's heavily configured with parameter
entities (whether such a system itself is useful is an open debate).

  <![%use-security-features;[
    <!ENTITY % TYPE_OF_LOSS_CODE_atts "
      security-level NMTOKEN #REQUIRED
    ">
  ]]>
  <!ENTITY % TYPE_OF_LOSS_CODE_atts "">

  <!ELEMENT TYPE_OF_LOSS_CODE EMPTY>
  <!ATTLIST TYPE_OF_LOSS_CODE
    %TYPE_OF_LOSS_CODE_atts;>


All the best,


David

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

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