MPLS TE VPN with OSPF Process ID vs Domain ID

The below scenario shows the different flavours of OSPF between CE-PE.

 OSPF with unique process = O IA (OSPF Route)

 OSPF with different process = O E2 (OSPF Route)

 OSPF with unique Process ID but different domain ID = O E2 (OSPF Route)

OSPF with different process ID but unique domain ID = O IA (OSPF Route)

Below link is the complete document for same.

MPLS Traffic engineering VPN with OSPF Process ID vs Domain ID

Regards
Chetan Kumar Ress