PROJECT:
       HESSI

 NAME:
       UNIVERSAL SUPERCLASS DEFINITION

 PURPOSE: 
       Provides data structures and methods used by any 
       classes

 CATEGORY:
       Object
; 
 CONSTRUCTION: 
       obj = Obj_New( 'Universal' )  

 PUBLIC METHODS:
      Compute: performs the operations required to put the object in
               a consistent state. (Do nothing in this class)
      Get(): accessor method to retrieve specific object parameter values
      Set: accessor method to assign specific object parameter values
      Print: prints all object parameters
      Plot: in this class, do nothing
      Need_Update(): tells if the procedure "Compute" must be called
                     for the current class.
      Update_Done, term: takes the term "term" out of the list in
                         need_update. 

 INPUTS:
      Through the accessor method "Set"
      obj->Set, KEYWORD=value, KEYWORD=value, ...
      where KEYWORD is one of those listed below
      Keywords can also be set for  each of the public methods

 OUTPUTS:
      Through the accessor method "Get"
      value = obj->Get( /KEYWORD )
      where KEYWORD is one of those listed below
  
 KEYWORDS: 
       ASK (Get, Set): asks before performing a critical operation
                       (e.g. remove files, etc...) Either 0B or
                       1B. Default is 1B.
       FILENAME (Get, Set): the file name where data associated with
                            the class is stored. Default is ''.
       NEED_UPDATE: 
       PLOT (Get, Set): plots data while performing. This is the
                        "display" equivalent to "verbose".
                        Either 0B or 1B. Default is 1B.
       VERBOSE (Get, Set): Prints informational messages on the tty
                           whenever required. Either 0B or 1B. 
                           Default is 1B.

 CALLS: ***
	GREP, STR_CHOP, UNIVERSAL::CLEANUP, UNIVERSAL::GET, UNIVERSAL::INIT
	UNIVERSAL::NEED_UPDATE_UNSET, UNIVERSAL::RESTORE, UNIVERSAL::SAVE
	UNIVERSAL::SET, UNIVERSAL::UNSET, UNIVERSAL__DEFINE
 HISTORY:
       Based on hsi_super__define, but generalized.
           June 28, 1999, A Csillaghy, csillag@ssl.berkeley.edu
       hsi_super: March 4, 1999, for Release 2 
           A Csillaghy, csillag@ssl.berkeley.edu