Elements cannot be described more than once in DTD, right ?

Marcus Carr mrc at allette.com.au
Wed Sep 22 00:41:11 BST 1999

Sebastien Sahuc wrote:

> I have an element (<operations>) than can have different set of sub
> element. How can I describe it in DTD ?
> For example :
> <affiliate>
>   <operations>
>     <get/>
>     <set/>
>   </operations>
> </affiliate>
> and :
> <merchant>
>   <operations>
>     <signup/>
>   </operations>
> </merchant>
> How can I express in DTD that affiliate operations in 'set' and 'get',
> and that merchant has only the 'signup' ?

This may be over-simplifying the problem, but I would just lose the operation element and
define affiliate and merchant as:

<!ELEMENT affiliate     (get | set)+>
<!ELEMENT merchant      (signup)>

The operations element seems redundant, unless the contents of affiliate and merchant can be
more complex than you have indicated.


Marcus Carr                      email:  mrc at allette.com.au
Allette Systems (Australia)      www:    http://www.allette.com.au
"Everything should be made as simple as possible, but not simpler."
       - Einstein

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