Selecting a random node from source-tree

In XSLT 1.0

How do I select a random node from the source-tree or from an external
document?
I was thinking of an XPath expression like this:

document('funnies.xml')/funnies/quote[random()]

Can I avoid using extension elements?

If not: how do I do it in Xalan-C++?
I am only familiar with MSXML and Xalan-J extension elements.

Thanks for your help.
Martin Lormes
alphaByte(.de)




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