Rather too subtle for me.
This appears to me to be a move away from 'simple' DTD based XML,
to an xsd model of ID+IDREF?
What about operating on a DTD based valid instance which has
idrefs and id's correctly defined in the DTD?
Ignored I guess?
Another trip wire for the unwary?
regards DaveP
# Did I misunterstand the meaning of the fn:idref (Finds
the elements that # link to the element with a given ID
value i.e. This function allows # reverse navigation from
IDs to IDREFs.) ?
Yes, you misunderstood it. The spec says: A node references
an ID value if
it is an element or attribute node whose type is xs:IDREF
or xs:IDREFS. So
if you have an attribute of type xs:IDREFS, then the
idref() function will
return that attribute, not the element containing it.
The reason for this is that you can have several IDREF
attributes on an
element, e.g.
<person id="id005" father="id001" mother="id002"/>
You want to know not only that person id005 has a reference
to id001, but
which attribute contains this reference. You can always get
the element node
if you want, just use idref($x)/..
Michael Kay
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