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Hi George,
Very nice, but it isn't stable in all circumstances (nor was mine for that fact). Consider the following distinct values: <edge source="IGetterC" target="Getter" dependency="positive"/> <edge source="IGetter" target="CGetter" dependency="positive"/> these will be seen as non-distinct when you use concat() the way you propose. A better solution might be to introduce a separator: concat(@dependency, '-', @source, '-', @target) but still, if the source'd be like this, it won't help much: <edge source="IGetter-C" target="Getter" dependency="positive"/> <edge source="IGetter" target="C-Getter" dependency="positive"/> Of course, if you know something about your source XML this may not be a problem at all. If it is a problem, you may want to choose the concat-approach with a private use character like &#F0001; or something even uglier, which is quite unlikely to occur in a source file, but will make your code less readable or pretty: <xsl:copy-of select=" for $i in distinct-values(*/concat(@dependency, '&#F0001; ', @source, '&#F0001;', @target)) return *[$i=concat(@dependency, '&#F0001; ', @source, '&#F0001; ', @target)][1]"/> In fact, all we are doing here is trying to stop a boat from making water by using wet clothes... Here's another attempt at a oneliner that is likely to work for de-duping this kind of sequences in XSLT 2.0 and it does not have the drawbacks of the previous attempts: <xsl:copy-of select="edge[not(some $i in preceding-sibling::edge satisfies deep-equal($i, .))]" /> if performance is important, this may be a tidbit faster but it may change the order of the result: <xsl:copy-of select="edge[not(some $i in unordered(preceding-sibling::edge) satisfies deep-equal($i, .))]" /> this may be equivalent to the fn:unordered method above, but in practice, I found that the fn:unordered did not introduce a difference in the results with saxon (though MK's book implied that document order would be applied on precding-sibling when using fn:unordered... ) <xsl:copy-of select="edge[not(some $i in following-sibling::edge satisfies deep-equal($i, .))]" /> Cheers, -- Abel Braaksma George Cristian Bina wrote: Here it is another 2.0 approach that gives the result in one instruction :) assumming the edge elements are children of the current context node:
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