The only valid project types the PSI can create are Project, Template, LightWeightProject, MasterProject, and InsertedProject. The other project types are for internal use and are not described.
The Global and ResGlobal values correspond to the enterprise global template and the enterprise resource pool in earlier versions of Microsoft Office Project Server. In Project Server 2007, the enterprise global and enterprise resource pool are not projects.
For more information, see the ReadProjectStatus PSI method.