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how does one represent an alternating set of elements?

From: John Utz <utz@singingfish.com>
Date: Fri, 15 Feb 2002 22:05:50 -0800 (PST)
To: xmlschema-dev@w3.org
Message-ID: <Pine.LNX.4.21.0202152201090.20334-100000@mail.singingfish.com>

i hope this is trivial for somebody, it's been an absolute hair puller for
me and some other people.

i am attempting to describe a set of alternating elements:

so, the valid collections of elements would be 

A, AB, ABA, ABAB,....

what would *not* be legal would be:

B, BA, AA, ABB, ABAA, BB,....

any help in describing this would be greatly appreciated!


Received on Saturday, 16 February 2002 01:06:21 UTC

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