-- File:	SingleParentEntity.cdl
-- Created:	Wed Oct 21 18:19:01 1992
-- Author:	Christian CAILLET
--		<cky@topsn2>
---Copyright:	 Matra Datavision 1992


deferred class SingleParentEntity  from IGESData  inherits IGESEntity

    ---Purpose : a SingleParentEntity is a kind of IGESEntity which can refer
    --           to a (Single) Parent, from Associativities list of an Entity
    --           a effective SingleParent definition entity must inherit it

uses Integer

raises OutOfRange

is

    SingleParent (me) returns IGESEntity  is deferred;
    ---Purpose : Returns the parent designated by the Entity, if only one !

    NbChildren (me) returns Integer  is deferred;
    ---Purpose : Returns the count of Entities designated as children

    Child (me; num : Integer) returns IGESEntity
    ---Purpose : Returns a Child given its rank
    	raises OutOfRange  is deferred;
    --           Error if <num> is below one or over <NbChildren>

end SingleParentEntity;