It looks like wsdl supports something like a union, using <choice> (in fact
wsdl schema uses it):
<complexType name="Composite">
<choice>
<element name="PO" minOccurs="1" maxOccurs="1"
type="tns:POType"/>
<element name="Invoice" minOccurs="0"
maxOccurs="unbounded" type="tns:InvoiceType"/>
</choice>
</complexType>
I've tried to define something like this in my wsdl and I'm getting the
following error when I try to build the wrapper class:
'Nested groups may not be specified'
I'm guessing that .NET can't find a way to map this onto its type system.
Ultimately what I would like is a method to return a variety of types. In
essence its an interface to an event queue, where the event data payload
depends on the event type. Do I have to use 'xsd:anyType' ? and if so, what
does the proxy actually return? Its prototype returns 'object'.
Thanks!
-John
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