I think that GridRPC could be an effective programming model, which helps application developers to write efficient 
parallel programs on the Grid. Standardization of the Grid RPC API would accelerate the development of Grid application 
technology. I think that this document provide useful information for the Grid community.

I have comments for details of the document:

Definition of grpc_prove_or (page 7):
If multiple RPC calls have completed when grpc_prove_or is invoked, which session ID is contained in *idPtr?

Typo:
Page 5, "GRPC_INVLID_FUNCTION_HANDLE"