[xsl] Simplest way to return an empty node-set

[Brian Smith <blsmith at blue dot weeg dot uiowa dot edu>]

What is the simplest XPath expression that is guarenteed to generate an 
empty node-set in an doucment? I sometimes need to return an empty 
node-set from an function using the EXSLT functions module. Returning an 
empty string (the default return value for an EXSLT function) does not 
work for me.

I would think there would be a really simple expression for the empty 
node-set, but I can't find it. I've thought of using "self::*[2]", 
self::*[not(.)]" and "self::*[. != .]" but those seem rather hack-ish.

Any suggestions?

Thanks,
Brian


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