xml-dev - XML Schema and context-senstive datatyping

[Sam Hunting <sam_hunting@yahoo.com>]

If this is a FAQ I apologize in advance.
 
Suppose I have an address that can look like this:
 
    <Address>
        <PostalCode>12345-6789</PostalCode>
        <CountryCode>US</CountryCode>
    </Address>
 
but can also look like this:
 
    <Address>
        <PostalCode>H3H-2A6</PostalCode>
        <CountryCode>CA</CountryCode>
    </Address>
 
and I want to change the datatype of <PostalCode> based on the value of
<CountryCode> so I can validate the user's entries, can I do that using
XML Schema? If so, how?
 
(One would wish to validate a Zip code for the USA, but a Canadian
Postal Code for Canada. The dataype of country code would be an
enumerated list a la ISO 3166.
 
Thanks in advance.
 
Sam Hunting


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<? "To imagine a language is to imagine a form of life."
    -- Ludwig Wittgenstein, Philosophical Investigations ?>

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