Re: Reusing and XPath expression

On Thu, Mar 3, 2011 at 3:56 AM, Jacobus Reyneke
<jacobusreyneke@xxxxxxxxx> 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:


In XPath 3.0 you can use inline function items (dynamically generated
function definitions).

See an example of this here:

http://dnovatchev.wordpress.com/2011/02/08/the-binary-search-tree-data-struct
urehaving-fun-with-xpath-3-0/

and here:


http://dnovatchev.wordpress.com/2011/02/20/the-set-datatype-implemented-in-xp
ath-3-0/



Cheers,
Dimitre Novatchev
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Never fight an inanimate object
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>
> B  B <xsl:template match="cv:*/gl:title">
> B  B  B  B <xsl:variable name="ancestors" select="count(ancestor::*)"/>
> B  B  B  B <fo:block>
> B  B  B  B  B  B <fo:inline
font-size="{($title-font-size)-2*$ancestors}pt">
> B  B  B  B  B  B  B  B <xsl:apply-templates></xsl:apply-templates>
> B  B  B  B  B  B </fo:inline>
> B  B  B  B </fo:block>
> B  B </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
>
>



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