Re: Options for dealing with IDs

Steven Pemberton wrote:
> From: "Robin Berjon" <robin.berjon@expway.fr>
> 
>>What happens when a DTD declares attribute "name" to be of type ID and
>>it occurs on the same element as xml:id with a different id, in a validated
>>document?
> 
> I have never understood this restriction in XML. I understand the problem of
> having two elements with the same name, but not of having two names on one
> element.
> 
> Can anyone explain to me what breaks when an element has two (different)
> names? Why does XML prevent you from having more than one attribute of type
> ID on an element?

I do not know the exact reasons behind that decision, but it would seem to me 
that having a garanteed one-to-one mapping between name and element could have 
some value. That way you are certain to have no duplicate elements in a set of 
IDs. Whether or not that is more important than the ability to give an element 
two names probably depends on your application.

-- 
Robin Berjon <robin.berjon@expway.fr>
Research Engineer, Expway        http://expway.fr/
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