following-sibling in a sorted for-each

[SchlauFuchs]

Hello,

I have an XML file which I transform to a tree-style document. I have to sort the xml nodes in a for-each loop. The display of a node is dependend on the nodes before and after it - see it like an expansion of a explorer folder structure - the last element of the tree has a leaf end.

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|- a node

|  |- a subnode

|  \- another sub node

\- last node

But I found that sorting doesn't affect the real order of an node, so even if the element is first() it can have a preceeding-sibling (in the unsorted order), as for last() there can be a follwing-sibling. But I now need to access the element before & after in the sorted order, to know what icon to display. How?

Kindly regards,
SF[/code]

[george]

Hi,

You can place the nodes in the sorthed order in a variable and then loop over that, thus you will get the preceding and following sibling axes work as you expect. Below there is a full working sample (XML, XSLT and result) for XSLT 2.0, if you want that in XSLT 1.0 then you need to use the node-set funtion to get the variable result as a set of nodes instead of a result tree fragment.

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<?xml version="1.0"?>

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

  <xsl:output method="text"/>

  <xsl:template match="/">

    <xsl:variable name="sorted">

      <xsl:apply-templates mode="copy" select="//node">

        <xsl:sort select="@id"/>

      </xsl:apply-templates>

    </xsl:variable>

    <xsl:for-each select="$sorted/*"> [preceding sibling]<xsl:value-of

        select="preceding-sibling::*[1]/@id"/> [current]<xsl:value-of select="@id"/> [following sibling]<xsl:value-of select="following-sibling::*[1]/@id"/>

      <xsl:text>

</xsl:text>

    </xsl:for-each>

  </xsl:template>

  <xsl:template mode="copy" match="node">

    <xsl:copy-of select="."/>

  </xsl:template>

</xsl:stylesheet>

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<test>

  <node id="3"/>

  <node id="4"/>

  <node id="2"/>

  <node id="5"/>

  <node id="1"/>

</test>

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 [preceding sibling] [current]1 [following sibling]2

 [preceding sibling]1 [current]2 [following sibling]3

 [preceding sibling]2 [current]3 [following sibling]4

 [preceding sibling]3 [current]4 [following sibling]5

 [preceding sibling]4 [current]5 [following sibling]

Best Regards,
George

[SchlauFuchs]

Thank you, that helped!

Ciao!
SF