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RE: problem using last() within <xsl:for-each-group>

Subject: RE: problem using last() within <xsl:for-each-group>
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Fri, 1 Apr 2005 12:28:18 +0100
xsl for each last
I've just tried this. There's incorrect output for last() in Saxon 8.1, but
it's fine in later releases (8.2 and 8.3).

The reason current() doesn't output anything is that the string-value of all
your element nodes is a zero-length string.

I've taken the liberty of adding this to my test collection - please be
aware that anything sent to this list may turn up in all sorts of places in
the future!

Michael Kay


> -----Original Message-----
> From: Matt Heckel [mailto:matt_heckel@xxxxxxxxx] 
> Sent: 01 April 2005 11:26
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  problem using last() within <xsl:for-each-group>
> Once again, my intuition has failed me and I need
> help. I was trying to find the last item within the
> last group of a data population and I've run into some
> interesting (ie. frustrating) behavior. For the
> record, I'm using SAXON8b to process an XSLT V. 2.0
> stylesheet.
> As I mentioned, I'm grouping using for-each-group and
> then iterating through each group using for-each on
> the current-group(). While using for-each through the
> current-group()using everything seems to be working
> just fine. That is, the position() value is sequential
> and last() returns the total iterations for the
> current-group(). However, in the outer
> for-each-group(ing) the last() function doesn't seem
> to be returning the right value. Since both for-each
> and for-each-group change the context when invoked, it
> seems they should both behave the same way?  Also, I
> was playing with the current() function and it doesn't
> seem to evaluate at all. This is of lesser importance
> to me for this particular problem I'm facing but
> thought I would ask for future reference. Thanks VERY
> much. My source doc and stylesheet are as follows.  
> <CASTDataset>
> CARRIER_NM="Constellation"/>
> CARRIER_NM="Constellation"/>
> CARRIER_NM="Constellation"/>
> CARRIER_NM="Constellation"/>
> CARRIER_NM="Eisenhower"/>
> CARRIER_NM="Eisenhower"/>
> CARRIER_NM="Eisenhower"/>
> CARRIER_NM="Eisenhower"/>
> CARRIER_NM="Enterprise"/>
> CARRIER_NM="Enterprise"/>
> CARRIER_NM="Enterprise"/>
> CARRIER_NM="Enterprise"/>
> </CASTDataset>
> <xsl:stylesheet version="2.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> xmlns:xs="http://www.w3.org/2001/XMLSchema"
> xmlns:fn="http://www.w3.org/2004/10/xpath-functions"
> xmlns:xdt="http://www.w3.org/2004/10/xpath-datatypes">
> <xsl:output method="text" version="1.0"
> encoding="UTF-8" indent="yes"
> omit-xml-declaration="yes"/>
> <xsl:variable name="endline" select="'&#x0ax;'"/>
> <xsl:template match="/">
> <xsl:for-each-group select="CASTDataset/ETL_AIR_7"
> group-by="@CARRIER_NM">
> <xsl:value-of select="concat('The current node is ',
> current())"/>
> <xsl:value-of select="$endline"/>
> <xsl:value-of
> select="concat(' For the ', @CARRIER_NM, ' group, the
> current position is ', position(), ' and last is ',
> last())"/>
> <xsl:value-of select="$endline"/>
> <xsl:for-each select="current-group()">
> <xsl:value-of select="concat('For the items within the
> current-group(), ACFT_TYP_SYN_NM is ',
> @ACFT_TYP_SYN_NM, ',the current position is ',
> position(), ' and last is ', last())"/>
> <xsl:value-of select="$endline"/>
> </xsl:for-each>
> </xsl:for-each-group>
> </xsl:template>
> </xsl:stylesheet>
> __________________________________ 
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