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> a.) As Uche pointed out, the question also involves whether node > identity or the text values of nodes are used. Your technique works > for identity based equivalence tests but not value based tests > Yes of course. If you want value based set equality that's not($b[. != $a]) and not($a[. != $b]) > b.) Calling count() four times instead of having an explicit operator > is bad form both performance wise and readability wise. No disagreement there, but you did't say it wasn't pretty, you said it wasn't possible. David _____________________________________________________________________ This message has been checked for all known viruses by Star Internet delivered through the MessageLabs Virus Scanning Service. For further information visit http://www.star.net.uk/stats.asp or alternatively call Star Internet for details on the Virus Scanning Service.
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