Question

How do i select the preceding nodes of a text node starting from a specific node whose id i know instead of getting the text nodes from the root node?

When i invoke the below piece from a template match of text node,
I get all the preceding text nodes from the root. I want to modify the above piece of code to select only the text nodes that appear after the node having a specific id say 123. i.e something like //*[@id=’123′]

          <xsl:template match="text()[. is $text-to-split]"> 
          <xsl:variable name="split-index" as="xsd:integer" 
           select="$index - sum(preceding::text()/string-length(.))"/> 
          <xsl:value-of select="substring(., 1, $split-index - 1)"/> 
          <xsl:copy-of select="$new"/> 
          <xsl:value-of select="substring(., $split-index)"/> 
          </xsl:template> 

         <xsl:variable name="text-to-split" as="text()?" 
         select="descendant::text()[sum((preceding::text(), .)/string-length(.)) ge $index][1]"/> 

How do i include the condition in places where i use preceding::text inorder to select preceding text nodes relative to the specific node’s id which i know?

Answer 1

Here are a few variants that you can use:

<xsl:stylesheet version="2.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:strip-space elements="*"/>
 <xsl:output method="text"/>

 <xsl:variable name="vStart" select="/*/*[@myId='123']/text()"/>
 <xsl:variable name="vEnd" select="/*/*[last()]"/>

    <xsl:template match="/">
      <xsl:value-of select=
       "*/*[last()]
             /sum(preceding::text()
                 intersect
                  $vStart/following::text()
                  )
     "/>
---------------
      <xsl:value-of select=
       "*/*[last()]
             /sum(preceding::text()[. >> $vStart])
     "/>
--------------- 
      <xsl:value-of select=
       "sum(/*/*[. >> $vStart and . &lt;&lt; $vEnd])
     "/>
    </xsl:template>
</xsl:stylesheet>

When this transformation is applied on the following XML document:

<nums>
  <num>01</num>
  <num>02</num>
  <num>03</num>
  <num>04</num>
  <num myId='123'>05</num>
  <num>06</num>
  <num>07</num>
  <num>08</num>
  <num>09</num>
  <num>010</num>
</nums>

the desired results are produced:

30
---------------
      30
--------------- 
      30