Create namespace
To create a namespace, just enter the namespace you want to use and define weather it is a global namespace or not. The name should match the name that you used in the DPC and MPC framework methods mention in the Creating a service file (Implement the framework MPC method / Implementing the framework DPC methods )
Global Namespace
A global namespace is appended to every OData Service that is using this framework. It might be useful for some global entities such as a "document" entity.