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Application module:
Appearance assignment |
ISO/TS 10303-1001:2019(E)
© ISO
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This clause specifies the information requirements for the
Appearance 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
Appearance_assignment_arm
schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Appearance_assignment_arm;
(*
The following EXPRESS interface statements specify the elements
imported from the ARMs of other application modules.
EXPRESS specification:
*)
USE FROM
Elemental_geometric_shape_arm;
--
ISO/TS 10303-1004
REFERENCE FROM
Support_resource_arm
--
ISO/TS 10303-1800
(bag_to_set);
(*
NOTE 1
The schemas referenced above are specified in the following
part of ISO 10303:
| Elemental_geometric_shape_arm |
ISO/TS 10303-1004 |
| Support_resource_arm |
ISO/TS 10303-1800 |
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 appearance_context type is an
extensible list of alternate data types
that allows for the designation of the data
type Representation.
NOTE
The list of entity data types may be
extended in application modules that use the constructs of
this module.
EXPRESS specification:
*)
TYPE
appearance_context =
EXTENSIBLE
GENERIC_ENTITY
SELECT
(Representation);
END_TYPE;
(*
The appearance_select type is an
extensible list of alternate data types.
Additional alternate data types are specified in select data
types that extend the
appearance_select type.
NOTE
This empty extensible select requires
extension in a further module to ensure that entities that refer to it have
at least one valid instantiation.
EXPRESS specification:
*)
TYPE
appearance_select =
EXTENSIBLE
GENERIC_ENTITY
SELECT;
END_TYPE;
(*
The context_dependent_appearance_assignment_set type is a set of
Context_dependent_appearance_assignment.
There shall exist two or more
Context_dependent_appearance_assignment.
EXPRESS specification:
*)
TYPE
context_dependent_appearance_assignment_set =
SET[2:?] OF Context_dependent_appearance_assignment;
END_TYPE;
(*
The geometric_mapping_target type allows for the designation of the data
types
Axis_placement and cartesian_transformation.
EXPRESS specification:
*)
TYPE
geometric_mapping_target =
SELECT
(Axis_placement,
cartesian_transformation);
END_TYPE;
(*
The overriding_style_context type is an
extensible list of alternate data types
that allows for the designation of the data
types Detailed_geometric_model_element and Styled_model.
NOTE
The list of entity data types may be
extended in application modules that use the constructs of
this module.
EXPRESS specification:
*)
TYPE
overriding_style_context =
EXTENSIBLE
GENERIC_ENTITY
SELECT
(Detailed_geometric_model_element,
Styled_model);
END_TYPE;
(*
The presented_model_select type is an
extensible list of alternate data types
that allows for the designation of the data
type Styled_model.
NOTE
The list of entity data types may be
extended in application modules that use the constructs of
this module.
EXPRESS specification:
*)
TYPE
presented_model_select =
EXTENSIBLE
GENERIC_ENTITY
SELECT
(Styled_model);
END_TYPE;
(*
The styled_element_appearance type allows for the designation of the data
types
Appearance_assignment and context_dependent_appearance_assignment_set.
EXPRESS specification:
*)
TYPE
styled_element_appearance =
SELECT
(Appearance_assignment,
context_dependent_appearance_assignment_set);
END_TYPE;
(*
The styled_element_target type allows for the designation of the data
types
Detailed_geometric_model_element, Styled_model_replication, representation_or_representation_reference, and Detailed_topological_model_element.
EXPRESS specification:
*)
TYPE
styled_element_target =
SELECT
(Detailed_geometric_model_element,
Styled_model_replication,
representation_or_representation_reference,
Detailed_topological_model_element);
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.
An Appearance_assignment is the identification of the characteristics of visual appearance of geometric or annotation elements.
NOTE 1
The various visual characteristics that can be assigned to points, curves or surfaces are defined in other application modules.
NOTE 2
The appearance can be defined explicitly for each represented element or for a context in which the elements
are represented.
NOTE 3
Several appearance components can be simultaneously specified with an Appearance_assignment.
EXPRESS specification:
*)
ENTITY Appearance_assignment;
appearance_components : SET[1:?] OF appearance_select;
END_ENTITY;
(*
Attribute definitions:
appearance_components:
the set of instances of entity types listed in
appearance_select
that characterize the appearance of geometric and annotation objects.
A Context_dependent_appearance_assignment is a type of
Appearance_assignment
that identifies visual characteristics that apply in the context of a viewing context.
EXAMPLE
A view in a drawing sheet or on a screen, and a layer are examples of contexts within which visual characteristics,
such as colour or line font, apply.
EXPRESS specification:
*)
ENTITY Context_dependent_appearance_assignment
SUBTYPE OF (Appearance_assignment);
context_definition : appearance_context;
END_ENTITY;
(*
Attribute definitions:
context_definition:
the instance of a type selected in
appearance_context
that identifies the context where the appearance components are valid.
A Context_dependent_over_riding_styled_element is a type of
Over_riding_styled_element
that overrides the visual characteristics of another
Styled_element
in the context of another
Detailed_geometric_model_element
or a
Styled_model.
EXPRESS specification:
*)
ENTITY Context_dependent_over_riding_styled_element
SUBTYPE OF (Over_riding_styled_element);
context_definition : LIST[1:?] OF overriding_style_context;
END_ENTITY;
(*
Attribute definitions:
context_definition:
specifies a list of one or more contexts for which the overriding styles applies.
An Over_riding_styled_element is a type of
Styled_element
that overrides the visual characteristics of another
Styled_element.
NOTE
Over-riding occurs when both instances of
Styled_element
are included, directly or indirectly, in the same presentation.
EXAMPLE
An instance of
Styled_element
may assign a blue colour to a circle.
An instance of Over_riding_styled_element would override that colour by a red colour.
EXPRESS specification:
*)
ENTITY Over_riding_styled_element
SUBTYPE OF (Styled_element);
over_ridden_element : Styled_element;
END_ENTITY;
(*
Attribute definitions:
over_ridden_element:
the
Styled_element
whose visual characteristics are over-ridden.
A Planar_box is a type of
Detailed_geometric_model_element
that specifies an arbitrary rectangular box and its location in a two-dimensional Cartesian coordinate system.
EXPRESS specification:
*)
ENTITY Planar_box
SUBTYPE OF (Detailed_geometric_model_element);
size_in_x : length_measure;
size_in_y : length_measure;
placement : Axis_placement;
END_ENTITY;
(*
Attribute definitions:
size_in_x:
specifies the extent in the x axis direction prior of applying the placement transformation.
size_in_y:
specifies the extent in the y axis direction prior of applying the placement transformation.
placement:
specifies the position and orientation of the bottom-left corner of the box.
A Styled_element is a type of
Representation_item
that has presentation information.
Only specializations of Styled_element can be instantiated.
EXPRESS specification:
*)
ENTITY Styled_element
SUBTYPE OF (Representation_item);
appearance :
OPTIONAL
styled_element_appearance;
element : styled_element_target;
invisible : BOOLEAN;
END_ENTITY;
(*
Attribute definitions:
appearance:
the
styled_element_appearance
that specifies the presentation characteristics of the Styled_element.
The value of this attribute need not be specified.
element:
the element to which styles are assigned.
invisible:
a Boolean value that specifies whether the Styled_element is invisible.
A Styled_model is a type of
Representation
that contains a set of geometric or annotation elements for which visual characteristics are specified.
EXPRESS specification:
*)
ENTITY Styled_model
ABSTRACT SUPERTYPE
SUBTYPE OF (Representation);
version_id :
OPTIONAL
STRING;
SELF\Representation.context_of_items : Geometric_coordinate_space;
DERIVE
styled_geometry : SET[0:?] OF Geometric_model := bag_to_set(QUERY (r <* (USEDIN(SELF\Representation.context_of_items,
'FOUNDATION_REPRESENTATION_ARM.' +
'REPRESENTATION.' + 'CONTEXT_OF_ITEMS')) |
'ELEMENTAL_GEOMETRIC_SHAPE_ARM.GEOMETRIC_MODEL' IN TYPEOF(r)));
END_ENTITY;
(*
Attribute definitions:
version_id:
the string that specifies the version identifier of the Styled_model. The value of this attribute need not be specified.
context_of_items:
the context of the styled
Geometric_coordinate_space.
styled_geometry:
the
Geometric_model
that contains the presented geometric information.
A Styled_model_replication is a type of
Representation_item
that replicates a
Styled_model
in another
Styled_model
that includes it with a transformation.
EXPRESS specification:
*)
ENTITY Styled_model_replication
SUBTYPE OF (Representation_item);
replicated_model : Styled_model;
source : Axis_placement;
target : geometric_mapping_target;
END_ENTITY;
(*
Attribute definitions:
replicated_model:
specifies the
Styled_model
that is replicated.
source:
the
Axis_placement
that specifies the origin of the replicated_model origin to be transformed.
target:
the
Axis_placement
or
Cartesian_transformation_2d
or
Cartesian_transformation_3d
that specifies the target for the transformation.
This subclause specifies the ARM subtype constraint for
this module. The subtype constraint places a constraint on the
possible super-type / subtype instantiations.
The ARM subtype constraint and definition is
specified below.
The aa_representation_item_subtypes constraint specifies a constraint that applies to instances of subtypes of
Representation_item.
EXPRESS specification:
*)
SUBTYPE_CONSTRAINT aa_representation_item_subtypes FOR Representation_item;
ONEOF (Styled_element,
Styled_model_replication);
END_SUBTYPE_CONSTRAINT;
(*
*)
END_SCHEMA; -- Appearance_assignment_arm
(*
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