Subject: Re: [xsl] Hierarchy problem From: David Carlisle <davidc@xxxxxxxxx> Date: Mon, 22 Jul 2002 14:56:56 +0100 |
> [Showing up my lack of set theory knowledge I can't see the difference in > this case] you are a member of the set of all men (item being a member of a set) the set consisting of you is a subset of the set of all men (singleton set being a subset of a set) In some sense these have the same meaning but > Also, if $y is a node which doesn't exist (or is higher in the doc tree than > $x) surely the statement would come back true? higher up the node tree it would be false. empty set it wuld be true which is part of the difference between "subset" and member of. if y is the empty set and x is a set then y is a subset of x. if you want to check that it is a proper subset (ie not empty and not the whole thing) you need to test for that as well, so test="$y and count($x/*|$y) = count($x/*)" or if you don't want teh sets y an dx to be equal test="$y and count($x/*|$y) = count($x/*) and not(count($x)=count($y))" 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. XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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