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Hello. I have a question about Schematron. I don't know if this is a suitable forum, but it's worth a shot. I have an XML file with certain elements with an attribute that can take one of a set of values. That set, however, change depending upon the position of the element. Here's a simplified sample: <root> <!-- the 1st matching element --> <element match="true" value="one"/> <element match="false"> <element match="false"> <!-- the 2nd matching element --> <element match="true" value="two"/> </element> </element> <element match="false/> <!-- the 3rd matching element --> <element match="true" value="three/> ... </root> I've been playing with XPath and the following expression will match all of the appropriate elements: "/descendant-or-self::node()[@match='true']" I can narrow this down by adding "[position()=n]" and then check in an <assert> that @value is one of the allowable terms. In order to ensure that I don't miss out on any _nested_ elements (as with number 2 above) - the matching elements could be absolutely anyplace in the document - I search all descendants of the root element. However, the above expression generates an error: "axis in pattern must be child or attribute". Does anybody have any ideas on how to solve this? Many thanks for your help
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