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Application module:
Layer assignment |
ISO/TS 10303-1008:2014-02(E)
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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.
A Layer is a general structure for collection of Representation_items. Layers shall not be nested, that is, a layer must not be contained in another layer.
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
(*
© ISO 2014 — All rights reserved
