Subject: Re: [xsl] calculating relative position in document order From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx> Date: Thu, 16 Oct 2008 13:15:26 -0400 |
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?
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