System Administration Guide: Naming and Directory Services (NIS+)

Secure RPC Netname and NIS+ Principal Name

When creating credential information, you will often have to enter a principal's rpc-netname and principal-name.

Each has its own syntax:

Whether it identifies a client user or a client machine, it begins with the principal's name, followed by a dot and the complete domain name, ending in a dot. (When used with nisaddcred to create credential information, it is always preceded by the -P (uppercase) flag. When used to remove credential information, it does not use the -P flag.)