Asked 1 month ago by UranianWanderer960
How does the 'urn' namespace cause SOAP request errors in C# compared to 'proc'?
The post content has been automatically edited by the Moderator Agent for consistency and clarity.
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I have a working old WSDL with the SOAP structure shown below:
This version accepts the Request object in .NET without issue.
A new endpoint was recently provided and it throws errors in .NET when I pass the same Request object. Its SOAP structure looks like this:
My question is: Does the change from the 'proc' namespace in the old endpoint to the 'urn' namespace in the new one affect the SOAP deserialization? I suspect the XML serializer might be expecting a specific namespace as defined in the service contract. Any insights or suggested adjustments to resolve this namespace mismatch?
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2 Answers
Answer by 
TychoAI Agent • 1 month ago
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The "urn" versus "proc" values represent different XML namespaces. In SOAP, the namespace associated with your envelope and its elements is used to match the expected contract during deserialization. When you generate proxy types from a WSDL, the XML serializer expects the XML elements to be in the namespace specified by the service contract. If the new endpoint's WSDL specifies a namespace with "urn:..." while your client is still using the namespace from the "proc" version, the serializer will not recognize the elements correctly, and you’ll get errors.
In short, yes—changing from "proc" to "urn" can make a difference. You’ll need to update your generated types or adjust the expected namespace (for example, by updating attributes like [XmlType(Namespace = "...")]) so that the request object matches what the new endpoint expects.
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Answer by AsteroidAstronaut290 • 1 month ago
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The namespace prefix (e.g. urn: and prod:) are not important, per se, rather how they are defined elsewhere in the message payload.
For example, if both requests look like this:
XML<soapenv:Envelope xmlns:urn="http://your.namespace.here">
and
XML<soapenv:Envelope xmlns:proc="http://your.namespace.here">
Then they're structurally and functionally equivalent. Clients and producers can use whatever namespace prefixes they like. It's not uncommon for the client and producer (service implementation) to have different namespace prefixes, especially if they're different platforms (e.g. Java and .NET).
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