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Subclassing types in XSD

From: barnum@--------.--
To: NULL
Date: 9/3/2007 5:41:00 AM


Hi,

if I have defined a type in a schema, can I subclass it (refine it)
without rewriting all of the type?
E.g. I have:
	<xs:element name="Apple" type="xs:string"/>
	<xs:element name="Banana" type="xs:string"/>
	<xs:element name="Citrus" type="xs:string"/>
	<xs:complexType name="MyType">
		<xs:sequence>
			<xs:element ref="Apple"/>
			<xs:element ref="Banana" minOccurs="0" maxOccurs="unbounded"/>
			<xs:element ref="Citrus"/>
		</xs:sequence>
	</xs:complexType>
And I want a derived type (where the new thing is that there must be
one or more Banana):
	<xs:complexType name="MyDerivedType">
		<xs:sequence>
			<xs:element ref="Apple"/>
			<xs:element ref="Banana" maxOccurs="unbounded"/>
			<xs:element ref="Citrus"/>
		</xs:sequence>
	</xs:complexType>
Can I do this without having to write Apple and Citrus in
MyDerivedType?

Thanks for any advice!

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