A string of alphanumeric characters.  The logging console name is a
 string in the form TTcnn: (if a terminal) or a VMS file
 specification if a file receives the events.  The logging file name
 is a VMS file specification.  The logging monitor name is a 1 to 9
 character name.  If the string contains spaces or tabs, enclose it
 in quotation marks.

 See file-spec for a description of valid VMS file specifications.