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   Re: [xml-dev] Please no UOM (was Re: maps)

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Joshua Allen scripsit:
> 
> (Not that anyone here is advocating this, but just in case...)
>  
> Regular expressions that enforce syntactic patterns for particular
> units of measure are fine, but I would strongly caution against trying to
> assign schema constraints based on the actual values (other than range
> constraints to specify valid values, which I would classify as regular
> expressions anyway).  Even worse are co-occurence constraints on the
> values, and worst of all are constraints that involve UOM translations.

Well, I think the rest of your rant is quite convincing on the matter of
translations, but I don't see where your argument against co-occurrence
constraints comes from, especially for quantized units.  

-- 
John Cowan                                <jcowan@reutershealth.com>     
http://www.reutershealth.com              http://www.ccil.org/~cowan
Yakka foob mog.  Grug pubbawup zink wattoom gazork.  Chumble spuzz.
    -- Calvin, giving Newton's First Law "in his own words"




 

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