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Application module:
Construction geometry |
ISO/TS 10303-1131:2019(E)
© ISO
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This clause specifies the information requirements for the
Construction geometry
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
Construction_geometry_arm
schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Construction_geometry_arm;
(*
The following EXPRESS interface statement specifies the elements
imported from the ARM of another application module.
EXPRESS specification:
*)
USE FROM
Basic_curve_arm;
--
ISO/TS 10303-1651
(*
NOTE 1
The schemas referenced above are specified in the following
part of ISO 10303:
| Basic_curve_arm |
ISO/TS 10303-1651 |
NOTE 2
See Annex C,
Figures
C.1and C.2
for a graphical representation of this schema.
This subclause specifies the ARM types
for this application module. The ARM types and
definitions are specified below.
The constructive_element_select type is an
extensible list of alternate data types
that allows for the designation of the data
types Axis_placement, Connected_edge_set, Connected_face_set, Curve, Edge, Face, Point, and Surface.
NOTE
The list of entity data types may be
extended in application modules that use the constructs of
this module.
EXPRESS specification:
*)
TYPE
constructive_element_select =
EXTENSIBLE
GENERIC_ENTITY
SELECT
(Axis_placement,
Connected_edge_set,
Connected_face_set,
Curve,
Edge,
Face,
Point,
Surface);
END_TYPE;
(*
The constructive_geometry_select type allows for the designation of the data
types
Constructive_geometry and Geometric_model.
EXPRESS specification:
*)
TYPE
constructive_geometry_select =
SELECT
(Constructive_geometry,
Geometric_model);
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 Constructive_geometry is a type of
Representation
that contains a collection of geometric elements used to support the definition of a
Geometric_model.
Each Constructive_geometry shall be associated with at least a
Geometric_model
or another Constructive_geometry, through an instance of Constructive_geometry_association.
NOTE 1
A Constructive_geometry may contain geometric elements that represents supplemental geometry as defined in ISO 16792.
NOTE 2
A Constructive_geometry may contain geometric elements that represents derived features as defined in ISO 17450.
NOTE 3
A Constructive_geometry may contain geometric elements that represents contacting features as defined in ISO 5459.
EXPRESS specification:
*)
ENTITY Constructive_geometry
SUBTYPE OF (Representation);
SELF\Representation.context_of_items : Geometric_coordinate_space;
SELF\Representation.items : SET[1:?] OF constructive_element_select;
END_ENTITY;
(*
Attribute definitions:
context_of_items:
the
Geometric_coordinate_space
in which the geometric elements are defined.
items:
an attribute inherited from the
Representation
shall be redeclared as the
constructive_element_select
for the Constructive_geometry.
There shall exist at least one
constructive_element_select
for the Constructive_geometry.
A Constructive_geometry_association is the association of an auxiliary
Constructive_geometry
with a
Geometric_model
or another
Constructive_geometry.
This association specifies that the auxiliary
Constructive_geometry
contains elements that have been used to build the elements of the
Geometric_model
or of the
Constructive_geometry.
EXPRESS specification:
*)
ENTITY Constructive_geometry_association;
auxiliary_geometry : Constructive_geometry;
base_geometry : constructive_geometry_select;
description : STRING;
WHERE
WR1: auxiliary_geometry\Representation.context_of_items :=: base_geometry\Representation.context_of_items;
END_ENTITY;
(*
Attribute definitions:
auxiliary_geometry:
the
Constructive_geometry
that supports the definition of the
base_geometry.
base_geometry:
the
Geometric_model
or the
Constructive_geometry
for which the auxiliary geometry was used.
description:
the text that provides additional information about the Constructive_geometry_association.
Formal propositions:
WR1:
The geometric coordinate space of the base geometry and the auxiliary geometry shall be the same.
*)
END_SCHEMA; -- Construction_geometry_arm
(*
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