Adding New Service and the Nop object context

Hello,


I am trying to Add my own Product Attribute Service. In trying to do so as a test I have copied all the current code for Product Attributes to a new separate project. I have also add to this project a new  UnityDependencyResolver and updated the web.config to point to the resolver which uses the new service.

How ever I think that I need to update the data model and the Nop object context.

I am unable to do so as it would cause a circular dependency with the Nop.BusinessLogic project.

How should I avoid this?

Thanks for the Help,
Beth