The following display formats are provided, to display the indicated
 information.  The format names can be abbreviated, as long as the
 abbreviation is unique.

   NAMES
     - The fully specified name, as defined in the directory service.

   BRIEF
     - The fully specified name, as defined in the directory service.
     - The name of the link (if any) used to access the node information.
     - The Phase IV synonym name registered for the node.
     - The NSAP addresses registered for the node.

   FULL
     - Same information as the BRIEF format.
     - The address tower information registered for the node.
     - The link name used to map the synonym to the node name (if any).
     - The link names used to map NSAP addresses to the node name (if any).

 The FULL display format also provides consistency checking, and prints
 messages describing any inconsistencies it finds, such as a missing
 synonym or NSAP address link, or a link that points at an incorrect name.