The Delete service removes an existing record from a relative
    or indexed file. You cannot use this service when processing
    sequential files.

                         RAB64 USERS (ALPHA ONLY)

       On Alpha systems, RAB64 can replace the RAB or RAB prefix
       wherever it is used with the Delete service on OpenVMS Alpha
       systems.

    Format

      SYS$DELETE  rab [,[err] [,suc]]