Retrieving the date of processing

Hello all,

For a (docbook) project of mine, it would be practical to fill the content of 
an element with the date of when the actual processing took place. I have a 
vague memory of an old (probably outdated) book which mentioned an XSL 
function which returned just that. Judging from google's empty answers, I'm 
rambling. Is there such a function, or can my problem be solved in some other 
elegant way?


Cheers,

                        Frans