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Application module:
Area 2D |
ISO/TS 10303-1631:2010-03(E)
© ISO
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This clause specifies the information requirements for the
Area 2D
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
Area_2d_arm
schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Area_2d_arm;
(*
The following EXPRESS interface statements specify the elements
imported from the ARMs of other application modules.
EXPRESS specification:
*)
USE FROM
Extended_basic_geometry_arm;
--
ISO/TS 10303-1667
USE FROM
Value_with_unit_extension_arm;
--
ISO/TS 10303-1753
(*
NOTE 1
The schemas referenced above are specified in the following
part of ISO 10303:
| Extended_basic_geometry_arm |
ISO/TS 10303-1667 |
| Value_with_unit_extension_arm |
ISO/TS 10303-1753 |
NOTE 2
See Annex C,
Figures
C.1and C.2
for a graphical representation of this schema.
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 Circular_area is a type of Primitive_2d containing the information necessary to determine the two-dimensional area of a circle.
EXPRESS specification:
*)
ENTITY Circular_area
SUBTYPE OF (Primitive_2d);
centre : Cartesian_point;
radius : Length_data_element;
END_ENTITY;
(*
Attribute definitions:
centre:
specifies the role of the Cartesian_point for the Circular_area.
radius:
specifies the role of the Length_data_element for the Circular_area.
An Elliptic_area is a type of Primitive_2d that is the surface area of an ellipsis.
EXPRESS specification:
*)
ENTITY Elliptic_area
SUBTYPE OF (Primitive_2d);
position : Axis_placement_2d;
semi_axis_1 : Length_data_element;
semi_axis_2 : Length_data_element;
END_ENTITY;
(*
Attribute definitions:
position:
specifies the role of the Axis_placement_2d for the Elliptic_area.
semi_axis_1:
specifies one role of the Length_data_element for the Elliptic_area.
semi_axis_2:
specifies one role of the Length_data_element for the Elliptic_area.
A Polygonal_area is a type of Primitive_2d that has three distinct points as boundaries in the same plane.
EXPRESS specification:
*)
ENTITY Polygonal_area
SUBTYPE OF (Primitive_2d);
bounds : LIST[3:?] OF
UNIQUE
Cartesian_point;
END_ENTITY;
(*
Attribute definitions:
bounds:
specifies the role of the Cartesian_point for the Polygonal_area. There shall be three or more Cartesian_point for a Polygonal_area. No Cartesian_point shall be specified more than once as a bounds for a particular Polygonal_area.
A Primitive_2d is a type of Detailed_geometric_model_element. A Primitive_2d is one of a Circular_area, an Elliptic_area, a Rectangular_area, or a Polygonal_area. It describes the surface area of a simple two-dimensional geometric shape.
EXAMPLE
the surface area of a triangle is a Primitive_2d, but the surface area of a pyramid is not a Primitive_2d.
EXPRESS specification:
*)
ENTITY Primitive_2d
ABSTRACT SUPERTYPE
OF (ONEOF (Circular_area,
Elliptic_area,
Rectangular_area,
Polygonal_area))
SUBTYPE OF (Detailed_geometric_model_element);
END_ENTITY;
(*
A Rectangular_area is a type of Primitive_2d that is the surface area of a rectangle.
EXPRESS specification:
*)
ENTITY Rectangular_area
SUBTYPE OF (Primitive_2d);
position : Axis_placement_2d;
x : Length_data_element;
y : Length_data_element;
END_ENTITY;
(*
Attribute definitions:
position:
specifies the role of the Axis_placement_2d for the Rectangular_area.
x:
specifies one role of the Length_data_element for the Rectangular_area.
y:
specifies one role of the Length_data_element for the Rectangular_area.
*)
END_SCHEMA; -- Area_2d_arm
(*
© ISO 2009 — All rights reserved
