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Re: Lookup, eliminating duplicates and sorting

Subject: Re: Lookup, eliminating duplicates and sorting
From: "Manfred Staudinger" <manfred.staudinger@xxxxxxxxx>
Date: Wed, 19 Jul 2006 15:45:02 -0700
Re:  Lookup
Most elegant, thanks! I'm sure I can learn a lot
from this ...
Manfred

On 19/07/06, Dimitre Novatchev <dnovatchev@xxxxxxxxx> wrote:
> xslt 1.0 - I've a set of nodes, for which I want
> a. to replace some values (most will not change), then
> b. eliminate the duplicates and sort them.
..............................................................................
> The text nodes represent URI's and are then used to
> create html links. So far I was only able to write in
> 2 different task what should be done in one:
>


One simple way to do this:


The following transformation:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:key name="kb" match="b[not(. = ../../e2/f/@c)]"
  use="."/>

 <xsl:key name="kb" match="@b1"
  use="../../../e1/b[. = current()/../@c]"/>

  <xsl:key name="kDist" match="b | @b1"
   use="."/>

        <xsl:template match="/">
          <e3>
            <xsl:for-each select=
             "key('kb', */e1/b)[generate-id()
                               =
                                generate-id(key('kDist', .)[1])
                               ]">
              <xsl:sort/>

        <b2><xsl:value-of select="."/></b2>
      </xsl:for-each>
          </e3>
        </xsl:template>
</xsl:stylesheet>

when applied on the provided source xml document:

<a>
        <e1>
                <b>abc</b>
                <b>abd</b>
                <b>abe</b>
                <b>abf</b>
                <b>abg</b>
                <b>abh</b>
                <b>abd</b>
        </e1>
        <e2>
                <f c="abe" b1="abc"/>
                <f c="abf" b1="abj"/>
                <f c="abg" b1="abi"/>
                <f c="abh" b1="abi"/>
        </e2>
</a>

produces the wanted result:

<e3>
        <b2>abc</b2>
        <b2>abd</b2>
        <b2>abi</b2>
        <b2>abj</b2>
</e3>


Hope this helped.


--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.

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