-- File:	IGESData_Protocol.cdl
-- Created:	Wed May  5 11:30:30 1993
-- Author:	Christian CAILLET
--		<cky@bravox>
---Copyright:	 Matra Datavision 1993



class Protocol  from IGESData  inherits  Protocol from Interface

    ---Purpose : Description of basic Protocol for IGES
    --           This comprises treatement of IGESModel and Recognition of
    --           Undefined-FreeFormat-Entity

uses OStream, Type, InterfaceModel, Check

is

    Create returns mutable Protocol from IGESData;

    NbResources (me) returns Integer;
    ---Purpose : Gives the count of Resource Protocol. Here, none

    Resource (me; num : Integer) returns Protocol from Interface;
    ---Purpose : Returns a Resource, given a rank. Here, none

    TypeNumber (me; atype : any Type) returns Integer;
    ---Purpose : Returns a Case Number, specific of each recognized Type
    --         Here, Undefined and Free Format Entities have the Number 1.

    	-- --    General Services (defined at Norm level)    -- --

    NewModel (me) returns mutable InterfaceModel;
    ---Purpose : Creates an empty Model for IGES Norm

    IsSuitableModel (me; model : InterfaceModel) returns Boolean;
    ---Purpose : Returns True if <model> is a Model of IGES Norm

    UnknownEntity (me) returns mutable Transient;
    ---Purpose : Creates a new Unknown Entity for IGES (UndefinedEntity)

    IsUnknownEntity (me; ent : Transient) returns Boolean;
    ---Purpose : Returns True if <ent> is an Unknown Entity for the Norm, i.e.
    --           Type UndefinedEntity, status Unknown

end Protocol;