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<a> <myElement>aaa</myElement> <b> <myElement>aaa</myElement> <myElement>xyz</myElement> <myElement>efg</myElement> </b> <c> <d> <myElement>khl</myElement> <myElement>xyz</myElement> </d> </c> </a> the result should be (the order doesn't matter) <myElement>aaa</myElement> <myElement>xyz</myElement> <myElement>efg</myElement> <myElement>khl</myElement> In early XPath "Working Draft"s there seems to have been a function called "distinct-nodes()" which should have done something similar but it used the identity of the nodes. This document still shows the function http://www.w3.org/TR/2003/WD-xpath-functions-20030502/#func-distinct-nodes and it was removed in http://www.w3.org/TR/2003/WD-xpath-functions-20031112/ A replacement for this function found in http://www.w3.org/TR/2005/WD-xpath-functions-20050404/#func-distinct-nodes-stable basically tells that //myElement[empty(subsequence(//myElement, 1, position()-1) intersect .)] should work to select distinct nodes (by identity). But I haven't been able to find a solution for distinct nodes by value. Any suggestions?
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