RE: Fallback from document() error

> > While a general exception handling mechanism would be interesting, is it
> > clear why this particular case is an error at all what would be lost in
> > mandating that document() returns an empty node set ...

One problem is where document() is used to retrieve a set of documents, e.g.
document(//a/@href). What happens if some of them exist and some don't? 

Mike Kay 

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