Why XML data typing is hard

david at megginson.com david at megginson.com
Mon Nov 30 21:30:33 GMT 1998

Liam R. E. Quin writes:

 > david at megginson.com wrote:


 > >   Warning: sample.xml line 18 column 12: Cannot validate constraint
 > >            "float" for unsupported language "ar" (trying default
 > >            locale en-CA).
 > >
 > Where did the word "float" come from in that error message?
 > Is it part of an augmented DTD or Schema, or a stylesheet, or is it
 > wired in to the application?
 > Maybe what you really need is
 >     <balance xml:type="float" xml:lang='ar'> ...
 > instead?

That's almost exactly the markup that I was imagining would generate
the warning, except that I'd use a different namespace for the lexical
constraint attribute (no need to overload the magic "xml" namespace).

All the best,


David Megginson                 david at megginson.com

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