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In XSLT how do I increment a global variable from a different scope?

Asked 2009-05-07T06:15:51.220
27

I am processing an XML file where I want to keep count of the number of nodes, so that I can use it as an ID as I write new nodes.

At the moment I have a global variable called 'counter'. I am able to access it within a template, but I haven't found a way of manipulating it within a template.

Here is a condensed version of my XSLT file:

<xsl:variable name="counter" select="1" as="xs:integer"/>

<xsl:template match="/"> 
   <xsl:for-each select="section">
      <xsl:call-template name="section"></xsl:call-template>
   </xsl:for-each>
</xsl:template>

<xsl:template name="section">

   <!-- Increment 'counter' here -->

   <span class="title" id="title-{$counter}"><xsl:value-of select="title"/></span>
</xsl:template>

Any suggestions how to go from here?

xml xslt global-variables
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1 Answer

1

You can use the position() function to do what you want. It would look something like this.

<xsl:template match="/">
  <xsl:for-each select="section">
    <xsl:call-template name="section">
      <xsl:with-param name="counter" select="{position()}"/>
    </xsl:call-template>
  </xsl:for-each>
</xsl:template>

<xsl:template name="section">
  <xsl:param name="counter"/>
  <span class="title" id="title-{$counter}">
    <xsl:value-of select="title"/>
  </span>
</xsl:template>
answered 2009-05-07T06:37:29.467

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