> Also, is there a way to determine if a document contains an 
> entity reference?
> 
No. By the time your stylesheet gets to see the document, any entity
references will have been expanded.

Except for unparsed entities, of course, but there the answer is also no:
you can get a specific unparsed entity using unparsed-entity-uri(), but only
if you already know its name.

Mike Kay


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