[[MachInterfaceGenerator]] (MIG) is a program which generates inter-process communication (IPC) code. Specifically Mig generates remote procedure call (RPC) code for communication between client and server processes running on a Mach microkernel.
Mach servers run as separate tasks and communicate with RPC messages. The RPC interface is language independant and somewhat complex. MIG mitigates this complexity.
GNU MIG is fully compatible with OSF MIG. The official Mig site is a page hosted on the official Hurd site. Mig Documentation? is available. Mig also has it's own CVS module within the main Hurd CVS site.
Currently, Web refers to the Mig Web.