How about posting some before and after code of exactly what you're
looking for?

I plan to convert a quite big collection of quotations archived in XML
to XHTML via XSL. Currently I am getting the job done with a Java-tool
I've programmed.

What I want to do is group the quotes into categories (according to
author (x)or content).

I'd write the result of this transformation into a file and process
that file with another XSL-sheet to produce the final XHTML-file.

I've two questions:
 The test should not be case-sensitive. How could I do that?

Is there a better way of doing it - maybe not requiring two passes?