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   Re: [xml-dev] The use of XML syntax in XML Query

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Jonathan Robie wrote:


> (((a,a)*, (b,b)*, (c,c)*) | ((a,a)*,a, (b,b)*,b, (c,c)*,c))
> 
> In this content model, either a,b, and c all occur an even number of 
> times, or they all occur an odd number of times.


Just for the fun of it, I transformed this content model into the
following RELAX NG schema (note that the main part is just
copy-and-paste!):

a = element a {empty}
b = element b {empty}
c = element c {empty}
start = element result {
	(((a,a)*,(b,b)*,(c,c)*)|
	((a,a)*,a,(b,b)*,b,(c,c)*,c))
	}

Jing was able to process this schema fine, despite its nondeterminism,
and correctly reported errors in several test documents I created.

-- 
Not to perambulate             || John Cowan <jcowan@reutershealth.com>
    the corridors               || http://www.reutershealth.com
during the hours of repose     || http://www.ccil.org/~cowan
    in the boots of ascension.  \\ Sign in Austrian ski-resort hotel





 

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