Question

Suppose I this have this XML doc, where … just represents other miscellaneous nodes:

<AA>
    <BB>
        <CC>True</CC>
        ...
    </BB>

    <BB>
        <CC>True</CC>
        ...
    </BB>

    <BB>
        <CC>False</CC>
        ...
    </BB>

    <BB>
        <CC>True</CC>
        ...
    </BB>


    <BB>
        <CC>False</CC>
        ...
    </BB>
</AA>

I’m trying to make some templates, e.g.:

<xsl:template match="/">

<DD>
    <xsl:apply-templates select="/AA/YYY" />
</DD>

<EE>
    <xsl:apply-templates select="/AA/XXX" />
</EE>

</xsl:template>

<xsl:template match="YYY">
 <!-- do stuff -->
</xsl:template>

<xsl:template match="XXX">
   <!-- do stuff -->
</xsl:template>

To produce output similar to this:

<AA>
    <DD>
        <BB>
            <CC>True</CC>
        </BB>
        <BB>
            <CC>True</CC>
            ...
        </BB>

        <BB>
            <CC>True</CC>
            ...
        </BB>
    </DD>

    <EE>
        <BB>
            <CC>False</CC>
            ...
        </BB>

        <BB>
            <CC>False</CC>
            ...
        </BB>
    </EE>
</AA>

I am just struggling to find xpaths to place in the match attributes, where I currently place XXX and YYY. Anyone got the answer?

Basically I want to select all nodes that have a child node that contains a specific contents.

Answer 1

If you use an identity transform, you shouldn’t need any additional templates if you’re not going to change anything in the <BB> elements.

XML Input

<AA>
  <BB>
    <CC>True</CC>
    ...
  </BB>

  <BB>
    <CC>True</CC>
    ...
  </BB>

  <BB>
    <CC>False</CC>
    ...
  </BB>

  <BB>
    <CC>True</CC>
    ...
  </BB>


  <BB>
    <CC>False</CC>
    ...
  </BB>
</AA>

XSLT 1.0

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output indent="yes"/>
  <xsl:strip-space elements="*"/>

  <xsl:template match="node()|@*">
    <xsl:copy>
      <xsl:apply-templates select="node()|@*"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="/AA">
    <xsl:copy>
      <xsl:apply-templates select="@*"/>
      <DD>
        <xsl:apply-templates select="BB[CC='True']"/>
      </DD>
      <EE>
        <xsl:apply-templates select="BB[CC='False']"/>
      </EE>
    </xsl:copy>
  </xsl:template>

</xsl:stylesheet>

XML Output

<AA>
  <DD>
    <BB>
      <CC>True</CC>
      ...
    </BB>
    <BB>
      <CC>True</CC>
      ...
    </BB>
    <BB>
      <CC>True</CC>
      ...
    </BB>
  </DD>
  <EE>
    <BB>
      <CC>False</CC>
      ...
    </BB>
    <BB>
      <CC>False</CC>
      ...
    </BB>
  </EE>
</AA>

If you do need to change <BB> add additional template(s) to override the identity transform.