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Application module:
Default setting association |
ISO/TS 10303-1809:2018-11(E)
© ISO
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This clause specifies the information requirements for the
Default setting association
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
Default_setting_association_arm
schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Default_setting_association_arm;
(*
The following EXPRESS interface statements specify the elements
imported from the ARMs of other application modules.
EXPRESS specification:
*)
USE FROM
Shape_property_assignment_arm;
--
ISO/TS 10303-1032
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:
| Shape_property_assignment_arm |
ISO/TS 10303-1032 |
| 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 Default_chamfer is a type of
Default_shape_property
for the definition of a chamfer that shall be applied to each non-tangent continuous, convex edge of a shape where no
other chamfer or edge round is specified.
For a given context only one of
Default_chamfer
and
Default_edge_round
shall be specified at a time.
A Default_chamfer is applicable only to edges that do not change from convex to concave.
EXAMPLE
During the creation of a 3D CAD model, the explicit modelling of chamfers is often omitted to save on time and model size.
EXPRESS specification:
*)
ENTITY Default_chamfer
SUBTYPE OF (Default_shape_property);
offset_value : Length_data_element;
DERIVE
SELF\Assigned_property.name : STRING := 'default chamfer';
END_ENTITY;
(*
Attribute definitions:
offset_value:
the width of the chamfer with respect to the two faces where it is applied.
name:
the words by which the Default_chamfer is known.
A Default_draft_angle is a type of
Default_shape_property
for the definition of an angle that is applied to each planar face of the part that is oriented in this draft direction.
NOTE
For parts manufactured by casting, the draft angle is necessary to facilitate the extraction of the part out of the form
after the casting.
NOTE
There may be various draft directions depending on the actual shape of the part.
The Default_draft_angle is, therefore, not necessarily meant to enable a system to create a resulting shape out of the application of the angle;
in most cases this is additional information that has to be interpreted by human beings.
EXPRESS specification:
*)
ENTITY Default_draft_angle
SUBTYPE OF (Default_shape_property);
draft_angle_value : Angle_data_element;
DERIVE
SELF\Assigned_property.name : STRING := 'default draft angle';
END_ENTITY;
(*
Attribute definitions:
draft_angle_value:
the value of the
Default_draft_angle.
name:
the words by which the Default_draft_angle is known.
A Default_edge_round is a type of
Default_setting_association_arm
for the definition of an edge round that shall be applied to any non-tangent continuous, convex edge
of a shape where no other edge round or chamfer is specified.
For a given context only one of Default_edge_round and
Default_chamfer
shall be specified at a time. A Default_edge_round is applicable only to edges that do not change from convex to concave.
EXAMPLE
During the creation of a 3D CAD model, the explicit modelling of edge rounds is often omitted to save on time and model
size.
EXPRESS specification:
*)
ENTITY Default_edge_round
SUBTYPE OF (Default_shape_property);
radius_value : Length_data_element;
DERIVE
SELF\Assigned_property.name : STRING := 'default edge round';
END_ENTITY;
(*
Attribute definitions:
radius_value:
the amount of curvature for a convex transition between two faces.
name:
the words by which the Default_edge_round is known.
A Default_fillet is a type of
Default_shape_property
that is the definition of a fillet that shall be applied to each non-tangent continuous,
concave edge of a shape model where no other fillet is specified and where its nature does not change from concave to convex.
EXAMPLE
During the creation of a 3D CAD model, the explicit modelling of fillets is often omitted to save on time and model size.
EXPRESS specification:
*)
ENTITY Default_fillet
SUBTYPE OF (Default_shape_property);
radius_value : Length_data_element;
DERIVE
SELF\Assigned_property.name : STRING := 'default fillet';
END_ENTITY;
(*
Attribute definitions:
radius_value:
the amount of curvature for a concave transition between two faces.
name:
the words by which the Default_fillet is known.
A Default_shape_property is a type of
Assigned_shape_property
that describes general characteristics of the shape of a product that might not be available through
the geometric representation.
Each Default_shape_property is either a
Default_chamfer,
a
Default_draft_angle,
a
Default_edge_round,
a
Default_fillet,
or a
Default_thickness.
EXPRESS specification:
*)
ENTITY Default_shape_property
ABSTRACT SUPERTYPE
OF (ONEOF (Default_chamfer,
Default_draft_angle,
Default_edge_round,
Default_fillet,
Default_thickness))
SUBTYPE OF (Assigned_shape_property);
SELF\Assigned_shape_property.described_element : shapeable_item;
END_ENTITY;
(*
Attribute definitions:
described_element:
the
shapeable_item
to which the
Default_shape_property
applies.
A Default_thickness is a type of
Default_shape_property
that specifies the thickness value that is valid for all sheet-like objects when a thickness value is not explicitly assigned.
EXPRESS specification:
*)
ENTITY Default_thickness
SUBTYPE OF (Default_shape_property);
thickness_value : Length_data_element;
parameter_name :
OPTIONAL
STRING;
DERIVE
SELF\Assigned_property.name : STRING := 'default thickness';
END_ENTITY;
(*
Attribute definitions:
thickness_value:
the actual value and the corresponding unit for the
Default_thickness.
The thickness_value is measured normal to the surface.
parameter_name:
the character, abbreviation, word or group thereof that designates the
Default_thickness.
The default value is 't'.
The value of this attribute need not be specified.
name:
the words by which the Default_thickness is known.
*)
END_SCHEMA; -- Default_setting_association_arm
(*
© ISO 2018 — All rights reserved
