Parameter

      file-spec

        specifies  the  file to be edited (use only OpenVMS file
         specifications).

         If no file specification is entered, LSE defaults
         to the last file edited by an LSEDIT command.

 If the file exists, LSE reads the file into the main  buffer;  and  the
 main  buffer  takes  for  its  name  the  name  and  type  of  the file
 specification on the  command  line.   The  file  type  determines  the
 default  language  that  will be used.  (For example, .FOR for FORTRAN,
 .PLI for PL/I, or .PAS for PASCAL.)

 If the specified file exists, it is  opened.   If  the  file  does  not
 exist,  it  is created when you leave LSE with an EXIT command.  If you
 leave LSE with  a  QUIT  command  a  file  will  not  be  created  and,
 therefore, a specified file will not be saved.