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Application module: External class ISO/TS 10303-1275:2004(E)
© ISO

Cover page
Table of contents
Copyright
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviations

4 Information requirements
   4.1 Required AM ARMs
   4.2 ARM type definition
   4.3 ARM entity definitions
5 Module interpreted model
   5.1 Mapping specification
   5.2 MIM EXPRESS short listing
     5.2.1 MIM type definition
     5.2.2 MIM entity definitions

A MIM short names
B Information object registration
C ARM EXPRESS-G   EXPRESS-G
D MIM EXPRESS-G   EXPRESS-G
E Computer interpretable listings
Bibliography
Index

4 Information requirements

This clause specifies the information requirements for the External class application module. The information requirements are specified as the Application Reference Model (ARM) of this application module.

NOTE 1  A graphical representation of the information requirements is given in Annex C.

NOTE 2  The mapping specification is specified in 5.1. It shows how the information requirements are met by using common resources and constructs defined or imported in the MIM schema of this application module.

The following EXPRESS specification begins the External_class_arm schema and identifies the necessary external references.

EXPRESS specification:

*)
SCHEMA External_class_arm;
(*

4.1 Required AM ARMs

The following EXPRESS interface statements specify the elements imported from the ARMs of other application modules.

EXPRESS specification:

*)
USE FROM Class_arm;    --  ISO/TS 10303-1070

USE FROM Name_assignment_arm;    --  ISO/TS 10303-1340
(*

NOTE 1   The schemas referenced above are specified in the following part of ISO 10303:

Class_arm ISO/TS 10303-1070
Name_assignment_arm ISO/TS 10303-1340

NOTE 2   See Annex C, Figures C.1and C.2 for a graphical representation of this schema.

4.2 ARM type definition

This subclause specifies the ARM type for this application module. The ARM type and definition is specified below.

4.2.1 external_class_assigned_name_select   EXPRESS-G

The external_class_assigned_name_select type is an extension of the assigned_name_select type. It adds the data type External_class_library to the list of alternate data types.

EXPRESS specification:

*)
TYPE external_class_assigned_name_select = SELECT BASED_ON assigned_name_select WITH
   (External_class_library);
END_TYPE;
(*

4.3 ARM entity definitions

This subclause specifies the ARM entities for this module. Each ARM application entity is an atomic element that embodies a unique application concept and contains attributes specifying the data elements of the entity. The ARM entities and definitions are specified below.

4.3.1 External_class   EXPRESS-GMapping table

An External_class is a type of Class that represents a reference to a class that is not included in the data exchange file and is defined in an external class library.

EXPRESS specification:

*)
ENTITY External_class
  SUBTYPE OF (Class);
  external_source : External_class_library;
END_ENTITY;
(*

Attribute definitions:

external_source: the identification of the external class library that provides the definition for the class.

4.3.2 External_class_library   EXPRESS-GMapping table

An External_class_library is the identification of an external class library.

EXPRESS specification:

*)
ENTITY External_class_library;
  id : STRING;
  description : OPTIONAL STRING;
END_ENTITY;
(*

Attribute definitions:

id: an identifier for the external class library.

NOTE    If appropriate this should be the URL of the external class library.

description: the text that provides further information about the External_class_library. The value of the attribute need not be specified.



*)
END_SCHEMA;  -- External_class_arm
(*


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