1 -- Created on: 1992-04-07
2 -- Created by: Christian CAILLET
3 -- Copyright (c) 1992-1999 Matra Datavision
4 -- Copyright (c) 1999-2014 OPEN CASCADE SAS
6 -- This file is part of Open CASCADE Technology software library.
8 -- This library is free software; you can redistribute it and/or modify it under
9 -- the terms of the GNU Lesser General Public License version 2.1 as published
10 -- by the Free Software Foundation, with special exception defined in the file
11 -- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 -- distribution for complete text of the license and disclaimer of any warranty.
14 -- Alternatively, this file may be used under the terms of Open CASCADE
15 -- commercial license or contractual agreement.
17 deferred class LevelListEntity from IGESData inherits IGESEntity
19 ---Purpose : defines required type for LevelList in directory part
20 -- an effective LevelList entity must inherits it
28 NbLevelNumbers (me) returns Integer is deferred;
29 ---Purpose : Must return the count of levels
31 LevelNumber (me; num : Integer) returns Integer
32 raises OutOfRange is deferred;
33 ---Purpose : returns the Level Number of <me>, indicated by <num>
34 -- raises an exception if num is out of range
36 HasLevelNumber (me; level : Integer) returns Boolean;
37 ---Purpose : returns True if <level> is in the list