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RE: Re: [xsl] Counting matching elements across two documents

Subject: RE: Re: [xsl] Counting matching elements across two documents
From: cknell@xxxxxxxxxx
Date: Mon, 17 Jan 2005 09:51:07 -0500

Thanks, that did it. Before I sent the message I tried using a variable to represent the main document for use in the for-each section, but I couldn't work out the issue with current(). As for speed, in this application neither of the input documents are going to grow large enough for that to be a concern.
Charles Knell
cknell@xxxxxxxxxx - email

-----Original Message-----
From:     David Carlisle <davidc@xxxxxxxxx>
Sent:     Mon, 17 Jan 2005 14:34:00 GMT
To:       xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject:  Re: [xsl] Counting matching elements across two documents

  <xsl:value-of select="count(//player[number = ./number])" />

The Xpaths number and ./number will always select the same thing so your
predicate is the same as true() ie the same as no predicate.

I think you want current() not . to get the number of the current player
in $roster.

//player selects all the players in the current document which is
roster.xml at this point. I think you intend that to be in matches.xml
in which case it wants to start with $matches  not with / where
$matches is defined at the top level by
<xsl:variable name="matches" select="/">


I changed // to an explict path as morally it ought to be faster, but
last time I told someone to do that MK pointed out that saxon has
optimisations for // (saving previous results) not used in general so it
isn't clearly a win. In any case probably using keys would speed things
up (or at least make the optimisation explict) but best to get things
working before worrying about speed.


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