Hi,
I'd like to be able to determine which element is "closer", in terms of
document order, to a given element. eg, given two structures containing
siblings:
<a>
<b>
<c>
and
<b>
<a>
<c>
I'd like to detect that the second structure is "out of order". In my fantasy
pseudo code, I might express the constraint as:
//c[positionEX(preceding::a[1]) > positionEX(preceding::b[1])]
Where my fantasy positionEX() function returns the absolute position of the
argument in the document.
Am I missing something, or is implementing this operation in real xpath/xslt
much more difficult than it seems it should be?
Thanks in advance for any help...
--T
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