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>

greetings;

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!

tnx!

johnu

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