filespec

    The file specification of the transaction logs you want to
    display information about. This can include the percent (%) and
    asterisk (*) wildcard characters.

    The SHOW LOG command uses the following defaults:

    o  If you omit the disk and directory, the SHOW LOG command
       looks for the transaction log in the directories pointed to
       by SYS$JOURNAL, which must be defined in executive mode in the
       system logical name table.

    o  If you omit the file type, the SHOW LOG command uses
       .LM$JOURNAL.