1.$ SAVE_DIR = F$TRNLNM("SYS$DISK")+F$DIRECTORY()
         .
         .
         .
      $ SET DEFAULT 'SAVE_DIR'

      The assignment statement concatenates the values returned
      by the F$DIRECTORY and F$TRNLNM functions, and assigns the
      resulting string to the symbol SAVE_DIR. The symbol SAVE_DIR
      consists of a full device and directory name string.

      The argument SYS$DISK is enclosed in quotation marks ("")
      because it is a character string. (The command interpreter
      treats all arguments that begin with alphabetic characters
      as symbols or lexical functions, unless the arguments are
      enclosed in quotation marks.) None of the optional arguments
      is specified, so the F$TRNLNM function uses the defaults.

      At the end of the command procedure, the original default
      directory is reset. When you reset the directory, you must
      place single quotation marks (` ')  around the symbol SAVE_DIR
      to force symbol substitution.

    2.$ DEFINE/TABLE=LNM$GROUP TERMINAL 'F$TRNLNM("SYS$OUTPUT")'

      This example shows a line from a command procedure that (1)
      uses the F$TRNLNM function to determine the name of the current
      output device and (2)  creates a group logical name table entry
      based on the equivalence string.

      You must enclose the argument SYS$OUTPUT in quotation marks
      because it is a character string.

      Also, in this example you must enclose the F$TRNLNM function
      in single quotation marks to force the lexical function to be
      evaluated; otherwise, the DEFINE command does not automatically
      evaluate the lexical function.

    3.$ RESULT= -
      _$ F$TRNLNM("INFILE","LNM$PROCESS",0,"SUPERVISOR",,"NO_ALIAS")
      $ SHOW SYMBOL RESULT
        RESULT = "FALSE"

      In this example, the F$TRNLNM function searches the process
      logical name table for the logical name INFILE. The function
      starts the search by looking for the logical name INFILE
      created in supervisor mode. If no match is found, the function
      looks for INFILE created in executive mode.

      When a match is found, the F$TRNLNM function determines whether
      the name INFILE was created with the NO_ALIAS attribute. In
      this case, the NO_ALIAS attribute is not specified.

    4.$ foo=f$trnlnm("FOO","LNM$SYSCLUSTER",,,"INTERLOCKED",)

      In this example, logical name FOO is translated in the
      LNM$SYSCLUSTER table in an interlocked manner; that is, all
      clusterwide logical name modifications in progress on this
      and other nodes are completed before the translation occurs.
      This ensures that the translation is based on the most recent
      definition of FOO.

      Because the case translation is not specified, the translation
      is by default CASE_BLIND.

    5.$ foo=f$trnlnm("FOO","LNM$SYSCLUSTER",,,"INTERLOCKED,CASE_SENSITIVE",)

      This example specifies both case sensitive and interlocked
      translation.