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Bob Wyman scripsit:

> 	Depending on your needs, a "SEQUENCE OF CHOICE" might give you
> what you want. i.e. order is preserved because it is a sequence, not a
> set, yet the actual type of each element in the sequence is any of the
> elements in the choice list. 

Which of course is exactly what (foo|bar|baz)* is.

-- 
Winter:  MIT,                                   John Cowan
Keio, INRIA,                                    jcowan@r...
Issue lots of Drafts.                           http://www.ccil.org/~cowan
So much more to understand!                     http://www.reutershealth.com
Might simplicity return?                        (A "tanka", or extended haiku)

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