2008/11/19 Dimitre Novatchev <dnovatchev@xxxxxxxxx>:

>
> Another way to do the same, without worrying about implementation
> specifics is to enclose the transformation into an <xsl:variable/>
> (which means that nothing is to be done with this variable).
>
> As this variable will capture the results of the transformation, no
> output will be produced.

And perhaps no transformation either, if the processor optimizes it away.