svcutil not exporting metadata for generic DataContract types

Question

Up until now I've been implementing WCF services out of the box by letting Visual Studio take care of generating all of the client-side proxy code. But to prevent some maintenance nightmares, I now need to share DataContracts between different services on the client side. So I've moved the DataContracts for my services into their own assembly so that I can generate a client-side assembly containing the DataContract classes as is demoed here and here.

After generating & referencing the client DataContract assembly and specifying Reuse Types when generating the proxy in Visual Studio, most of the DataContract code was gone from the generated Reference.cs class, except a couple types were left behind:

public partial class OWSResultOfArrayOfguid ...

public partial class OWSResultOfOrderFulfillmentResult ...

These are the return types of a couple service methods that use a DataContract with a generic type. Here is its declaration:

[DataContract(Name = "OWSResultOf{0}")]
public class OWSResult<T>

After inspecting the .xsd files that I generated using svcutil, OWSResult, of any type, does not appear to be included. Here is the command I used to generate the files:

>svcutil /dconly "C:\...\bin\Debug\OWS.DataContracts.dll"

Where DataContracts.dll is the assembly I moved all of the DataContract definitions into. And in case I'm just not seeing the definition in the .xsd files, here is the command I'm using to generate the C# client code:

>svcutil /dconly /language:C# *.xsd /out:OWS.DataContracts.cs /edb /s /ct:System.Collections.Generic.List`1 /r:C:\windows\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll

So I added a KnownType attribute to my generic DataContract (OWSResult) to tell the tool about these implementations of the type. EG:

[KnownType(typeof(OWSResult<Guid>))][KnownType(typeof(OWSResult<OrderFulfillmentResult>))]

but it still does not generate these types. How can I get svcutil to include these?