RE: lookup table (was: mixed content nodes question)

> But I obviously have a fundamental misunderstanding: I know that the
> select expression in the original call returns a node-set, which the
> XSLT processor apparently converts automatically to a string when
> evaluating the test expression (as desired, since I get the intended
> language names in my output).  

When you compare a node-set to a string, the result is true if any node in
the node-set matches the string. If the node-set is empty, there's no node
that matches the string, so the result is false (regardless of the value of
the string).

Michael Kay
http://www.saxonica.com/