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Suppose $tail is a nodeset of 'A' nodes: <xsl:variable name="tail" select="//A"/> All 'A' nodes have an attribute 'property' which contains a number. Now I want to find the first 'A' node inside $tail that has a certain property ( in this case: the sum of all preceding @property = $someNumber ). If you use the following declaration just once, there's no problem. <xsl:variable name="test" select="$tail[sum(preceding-sibling::A/@property) = $someNumber][1]"/> However, if $tail is part of a recursion process and changes, how can I make sure that the 'preceding-sibling::A' are restricted to the current $tail nodes? -- Marc
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