generate-id()

Has anyone found a use for generate-id()? (April 21 XSLT WD, section 6.2.2)

It says it generates a string which "can be used as a unique identifier".
Is this an identifier in the sense of the id() function? If so, does this
mean the generated identifier is guaranteed distinct from any IDs actually
present in the source document?

If not, what is it for, and how can it be used?

Mike Kay 


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