Jean-François Michaud wrote:

> I was wondering if it was possible to reference a boolean predicate in
> a variable. Basically I want to do with the boolean predicate what you
> would do with any other variable; I want it to apply to many places
> without having to update all those different locations if the
> predicate needs to change.
> 
> This is not a full stylesheet, just snippets of the idea
> 
>   <xsl:variable name="list-orphans-widows.properties">
>     position()=last()-1 or position()=last()-2 or (position()='1' and
> position()!=last()) or (position()='2' and position()!=last())
>   </xsl:variable>

You can't store an XPath expression in a variable and evaluate that 
XPath expression dynamically. So your variable above is simply 
containing a result tree fragment with a text node containing some text.
XSLT 2.0 allows you to define your own functions and call them, that is 
the closest I can think of. Besides processor specific extension 
functions allowing you to evaluate a string with an XPath expression.

-- 

	Martin Honnen
	http://JavaScript.FAQTs.com/