Re: Mixed type fields

James Clark <jjc@jclark.com> writes:

> What happens if fields in identity constraints evaluate to values of
> different types for different target node-sets? This would require be to
> compare values of different types.  Is this an error, always false,
> false only if they do not have a common super type or what?

Should be clarified.  I _think_ (need confirmation from the Datatypes
editors) that values from distinct value spaces always compare not
equal, but that a derived type's values _are_ in the same value space as
its base type, so e.g. 

3 [integer] = 3 [short]

and "foo" [string] = "foo" [token]

ht
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  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
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