Using ID's usefully ?

Winton Davies wdavies at
Fri May 21 05:00:48 BST 1999

Dear All.

Can anyone suggest a legit way in XML to do this:

<!ELEMENT a (b)>

<!ELEMENT b (c)>

<!ATTLIST c id ID #required>


<a><b>c.1</b></a>    <******* rather than a nested <c>, re-use an id 
for a C object.

<c id="c.1"/> <- obviously these maybe more structured.
<c id="c.2"/>

Thanks for getting this far! This is as trivial an example as I could 
make it - I hope the problem is clear: Principled re-use of ID's, and 
ELEMENT TYPING of ID's. It seems strange the only way to use IDREF's 
is in attributes (especially as there is no default "value" (c.f "id" 
for ID) ATTRIBUTE, nor a way to specify the ELEMENT TYPE of IDREF one 
may have).

Also - how does one specify multiply IDREFS ? <tag attr1="1" 
attr1="2"> or something else ?

E-Mail:      wdavies at (Winton Davies)
Tel:         OFFICE: 1-650-725-7469 (USA)  FAX: 1-650-725-7411
Address:     Room 206, Gates, Stanford University, CA 94305, USA

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