Why doesn't XML have Bag?

[Richard L. Goerwitz]

Leigh Dodds wrote:

> Isn't this an unordered list of elements?
> 
> <!ELEMENT BAG   (A?,B?,C?,D?)*>
> <!ELEMENT BAG   (A?,B?,C?,D?)+>

These are equivalent (although the bottom one might be considered
'ambiguous' in SGML terms).  I suspect you'll convey your inten-
tions a lot better if you use:

> <!ELEMENT BAG (A | B | C | D)*>

-- 

Richard Goerwitz
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