Re: Re: Can grouping and sorting be done in single t

Sorry for my late reply as I was out of town.

Thanks Dimitre for the "exslt:node-set()" solution and Jarkko for the "xalan:nodeset()" solution.

Does it mean that there is no solution without using processor dependent solution nor external library in XSLT 1.0?

Well, I am new to XSLT. I suspect that there are some limitations in node set in XSLT. That was why the function was extended via using external library or via enhancing a processor. Am I correct?

How about in XSLT 2.0? Should I drove in some XSLT tutorials to extend my knowledge?

Highly appreciated if you can give me some recommendations.

----- Original Message -----
From: "Dimitre Novatchev" <dnovatchev@xxxxxxxxx>
Date: Tue, 11 Nov 2003 21:11:11 +0100
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject:  Re: Can grouping and sorting be done in single transformation?


"Herman Kwok" <herman.kwok@xxxxxxxxxxxxxxxx> wrote in message
news:20031110060052.4077.qmail@xxxxxxxxxxxx
> Hi all,
>
> I am new to XSL. I am woundering if sorting and grouping can be done in
single transformation. If it is possible, would you please tell me how?

Yes, if you use the exslt:node-set() extension function.

This transformation:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 xmlns:ext="http://exslt.org/common"
 exclude-result-prefixes="ext"
 >
  <xsl:output omit-xml-declaration="yes" indent="yes"/>
  <xsl:template match="result">
    <xsl:copy>
      <xsl:variable name="vrtfSorted">
        <xsl:for-each select="item">
          <xsl:sort select="@desc"/>
          <xsl:copy-of select="."/>
        </xsl:for-each>
      </xsl:variable>

      <xsl:variable name="vSorted"
          select="ext:node-set($vrtfSorted)/*"/>
      <xsl:for-each select="$vSorted">
        <xsl:if test="position() mod 3 = 1">
          <xsl:variable name="vPos" select="position()"/>
          <group>
            <xsl:copy-of select=". | $vSorted[position() > $vPos
                                            and
                                             position() < $vPos + 3
                                             ]"/>
          </group>
        </xsl:if>
      </xsl:for-each>
    </xsl:copy>
  </xsl:template>
</xsl:stylesheet>

when applied on your source.xml:

<result>
  <item desc="d"/>
  <item desc="j"/>
  <item desc="k"/>
  <item desc="e"/>
  <item desc="c"/>
  <item desc="g"/>
  <item desc="h"/>
  <item desc="i"/>
  <item desc="f"/>
  <item desc="a"/>
  <item desc="b"/>
</result>

produces the wanted result:

<result>
   <group>
      <item desc="a"/>
      <item desc="b"/>
      <item desc="c"/>
   </group>
   <group>
      <item desc="d"/>
      <item desc="e"/>
      <item desc="f"/>
   </group>
   <group>
      <item desc="g"/>
      <item desc="h"/>
      <item desc="i"/>
   </group>
   <group>
      <item desc="j"/>
      <item desc="k"/>
   </group>
</result>


=====
Cheers,

Dimitre Novatchev.
http://fxsl.sourceforge.net/ -- the home of FXSL




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