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RE: Subtyping in XML

• To: "'ht@c...'" <ht@c...>, Paul Prescod <paulp@p...>
• Subject: RE: Subtyping in XML
• From: Jeff Lowery <jlowery@s...>
• Date: Thu, 5 Sep 2002 09:54:37 -0700
• Cc: xml-dev@l...

Okay, I've got my mind right. 

It's not an enumeration of simpletype values that I remember, but more along
the lines of Paul's example, below.  The example is from Eric vdV's book, p.
203 (paraphrased below):

<group name="name">
    <choice>
         <element ref="a"/>
         <element ref="b"/>
    </choice>
 </group>

<redefine schemaLocation="foo.xsd">
       <group name="name">
              <choice>
                  <group ref="name"/>
                 <element ref="c"/>
              </choice>
        </group>
</redefine>

Quoth:  "... the effect of this redefinition is to allow a new element ([c])
to be accepted instead of a [a] or [b]."

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