NAM

   The name (NAM) block provides additional fields for extended file
   specification use, including parsing and obtaining the actual
   file specification used for a file operation. On Alpha systems,
   the long name block (NAML) can optionally take the place of a NAM
   block (see NAML).

   The following table lists the symbolic offset, the size in bytes,
   and a brief description of each field.

   Offset             Size               Description

   NAM$B_BID          1                  Block identifier
   NAM$B_BLN          1                  Block length
   NAM$B_DEV          1                  Device string length
   NAM$L_DEV          4                  Device string address
   NAM$W_DID          6                  Directory identification
   NAM$B_DIR          1                  Directory string length
   NA