Hi Carlos,
Your service can accept OData messages of any version, but unfortunately the OData Validation assertion is not compatible with v3 or v4. You are correct in that you can use our assertions to do some validation, but there is currently no assertion that will validate an OData v3 or v4 request or its payload against the definitions in the service document. We will consider it for a future release, but we don’t have an ETA for it at this time.
Regards,
Jamie Williams