The DEFINE command creates a logical name which represents one or
    more equivalence names. An equivalence name can be a device name,
    another logical name, a file specification, or any other string.

    The use of a logical name can be limited to a process, a job,
    or a group, or it can be used by an entire system or an entire
    OpenVMS Cluster system. It depends on the table in which the
    logical name is created, which you specify with one of the
    following qualifiers: /PROCESS, /JOB, /GROUP, /SYSTEM, or /TABLE.

    These first four qualifiers represent the process, job, group,
    or system logical name tables, respectively, whereas the /TABLE
    qualifier is used to specify any type of table. Furthermore,
    the /TABLE qualifier is the only one to use when specifying a
    clusterwide logical name table.

    If you enter more than one of the qualifiers /PROCESS, /JOB,
    /GROUP, /SYSTEM, or /TABLE, only the last one entered is
    accepted. If you do not specify a table with one of these
    qualifiers, the logical name is added to your process logical
    name table.

    To specify the access mode of the logical name you are creating,
    use the /USER_MODE, the /SUPERVISOR_MODE, or the /EXECUTIVE_MODE
    qualifier. If you enter more than one of these qualifiers, only
    the last one entered is accepted. If you do not specify an access
    mode, a supervisor-mode name is created. You can create a logical
    name in the same mode as the table in which you are placing the
    name, or in an outer mode. (User mode is the outermost mode;
    executive mode is the innermost mode.)