Re: [xsl] Reusing and XPath expression

[Michael Kay <mike@xxxxxxxxxxxx>]

You seem to be looking for functions:

<xsl:function name="f:depth" as="xs:integer">
<xsl:param name="node" as="node()"/>
<xsl:sequence select="count($node/ancestor::*)"/>
</xsl:function>

Michael Kay
Saxonica

On 03/03/2011 11:56, Jacobus Reyneke wrote:
> Good day,
>
> Is there some way to re-use just part of an XPath expression. Here I
> made an attempt by assigning it to a variable, but the benefit of
> doing it this way is very limited:
>
>      <xsl:template match="cv:*/gl:title">
>          <xsl:variable name="ancestors" select="count(ancestor::*)"/>
>          <fo:block>
>              <fo:inline font-size="{($title-font-size)-2*$ancestors}pt">
>                  <xsl:apply-templates></xsl:apply-templates>
>              </fo:inline>
>          </fo:block>
>      </xsl:template>
>
> In this example I resize the section titles in FO depending on the
> depth of the title. Is there some way I can put the
> "count(ancestor::*)" expression in one place and so re-use it in
> different templates by 'calling' it? I cannot just make the expression
> 'global' because new values cannot be assigned to it.
>
> This is just a question in an attempt to understand the mechanism of
> re-using bits of XPath in an attempt to keep templates maintainable.
>
> Kind regards,
> Jacobus