-- File:	StepData_EDescr.cdl
-- Created:	Wed Apr  2 09:04:40 1997
-- Author:	Administrateur Atelier XSTEP
--		<xstep@heliox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1997


deferred class EDescr  from StepData    inherits TShared

    ---Purpose : This class is intended to describe the authorized form for an
    --           entity, either Simple or Plex

uses CString,
     Described from StepData

is

    Matches    (me; steptype : CString) returns Boolean  is deferred;
    ---Purpose : Tells if a ESDescr matches a step type : exact or super type

    IsComplex  (me) returns Boolean  is deferred;
    ---Purpose : Tells if a EDescr is complex (ECDescr) or simple (ESDescr)

    NewEntity  (me) returns mutable Described  is deferred;
    ---Purpose : Creates a described entity (i.e. a simple one)

end EDescr;