Application module: Layer assignment | ISO/TS 10303-1008:2014-02(E) © ISO |
This clause specifies the information requirements for the Layer assignment 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.
This clause defines the information requirements to which implementations shall conform using the EXPRESS language as defined in ISO 10303-11. The following begins the Layer_assignment_arm schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Layer_assignment_arm;
(*
The following EXPRESS interface statements specify the elements imported from the ARMs of other application modules.
EXPRESS specification:
*)
USE FROM
Foundation_representation_arm;
--
ISO/TS 10303-1006
USE FROM
Group_arm;
--
ISO/TS 10303-1113
(*
NOTE 1 The schemas referenced above are specified in the following part of ISO 10303:
Foundation_representation_arm ISO/TS 10303-1006 Group_arm ISO/TS 10303-1113
NOTE 2 See Annex C, Figures C.1and C.2 for a graphical representation of this schema.
This subclause specifies the ARM type for this application module. The ARM type and definition is specified below.
The structuring_method_select type is an extensible list of alternate data types that allows for the designation of the data types Group and Layer.
NOTE The list of entity data types may be extended in application modules that use the constructs of this module.
EXPRESS specification:
*)
TYPE
structuring_method_select =
EXTENSIBLE
SELECT
(Group,
Layer);
END_TYPE;
(*
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.
EXPRESS specification:
*)
ENTITY Layer;
id : STRING;
description : STRING;
layered_elements : SET[1:?] OF Representation_item;
END_ENTITY;
(*
Attribute definitions:
id: specifies the layer identifier.
description: the text that provides further information about the Layer.
layered_elements: specifies the set of Representation_items assigned to the layer.
A Structuring_method_hierarchy is a mechanism to build up a nesting of Group objects within Group or Layer objects in structuring methods.
NOTE This mechanism facilitates the nesting of groups in other groups and the nesting of groups in a layer, but not the nesting of one layer in another layer or group.
EXPRESS specification:
*)
ENTITY Structuring_method_hierarchy;
relating : structuring_method_select;
related : Group;
END_ENTITY;
(*
Attribute definitions:
relating: specifies the structuring_method_select in that the Group is nested.
related: specifies the Group object to be nested.
*)
END_SCHEMA; -- Layer_assignment_arm
(*
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