Question

I would like to create a template in xslt with a condition on the parameter of the tag I am matching.

for exemple:
If I have the tags <par class="class1"> and <par class="class2">

I would like to create a template like this :

<xsl:template match="par">
 <xsl:if test="class=class1">
  <fo:block
    space-before="3pt"
    space-after="3pt">

    <xsl:apply-templates />

  </fo:block>
 </xsl:if>
 <xsl:otherwise>
  <fo:block
    space-before="10pt"
    space-after="10pt">

    <xsl:apply-templates />

  </fo:block>
 </xsl:otherwise>
</xsl:template>

But it doesn’t work. How can I test on the parameter of the tag ?

thanks in advance.

Answer 1

The technical term for these “parameters” is “attributes” (just in case that helps for future searches) and you refer to them with @class etc.

Also note that <xsl:otherwise> is not for <xsl:if>, but for <xsl:choose>:

<xsl:template match="par">
  <xsl:choose>
    <xsl:when test="@class='class1'">
      <fo:block
        space-before="3pt"
        space-after="3pt">

        <xsl:apply-templates />

      </fo:block>
    </xsl:when>
    <xsl:otherwise>
      <fo:block
        space-before="10pt"
        space-after="10pt">

        <xsl:apply-templates />

      </fo:block>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

Or, to better show the actual differences,

<xsl:template match="par">
  <fo:block>
    <xsl:choose>
      <xsl:when test="@class='class1'">
        <xsl:attribute name='space-before'>3pt</xsl:attribute>
        <xsl:attribute name='space-after'>3pt</xsl:attribute>
      </xsl:when>
      <xsl:otherwise>
        <xsl:attribute name='space-before'>10pt</xsl:attribute>
        <xsl:attribute name='space-after'>10pt</xsl:attribute>
      </xsl:otherwise>
    </xsl:choose>
    <xsl:apply-templates/>
  </fo:block>
</xsl:template>