Why doesn't XML have Bag?

[Paul Prescod]

"Richard L. Goerwitz" wrote:
> 
> 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).  

Actually, it would not. Any particular content node list can only present
a single path through the content model.

-- 
 Paul Prescod  - ISOGEN Consulting Engineer speaking for only himself
 http://itrc.uwaterloo.ca/~papresco

"Perpetually obsolescing and thus losing all data and programs every 10
years (the current pattern) is no way to run an information economy or
a civilization." - Stewart Brand, founder of the Whole Earth Catalog
http://www.wired.com/news/news/culture/story/10124.html

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