Re: [XQuery] 3.8 FLWOR Expressions: tuple stream

Daniela Florescu wrote:
> 
> > So in fact, these things are best described as *mappings* (from
> > variables to values), not tuples.
> 
> But what is a tuple if not a mapping from field names to values?

Hmmm. It appears there are (at least) two definitions of "tuple".
See <http://en.wikipedia.org/wiki/Tuple>, for instance.

I guess you and the XQuery spec are using it in the relational database
sense, whereas I had the definition from mathematics and programming
languages in my head.

I think it could bear clarification in the spec.

-Michael Dyck

Received on Saturday, 14 February 2004 22:45:52 UTC