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Application module:
Classification with attributes |
ISO/TS 10303-1111:2019(E)
© ISO
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This clause specifies the information requirements for the
Classification with attributes
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
Classification_with_attributes_arm
schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Classification_with_attributes_arm;
(*
The following EXPRESS interface statements specify the elements
imported from the ARMs of other application modules.
EXPRESS specification:
*)
USE FROM
Classification_assignment_arm;
--
ISO/TS 10303-1114
USE FROM
Extended_measure_representation_arm;
--
ISO/TS 10303-1106
USE FROM
Independent_property_arm;
--
ISO/TS 10303-1036
USE FROM
Identification_assignment_arm;
--
ISO/TS 10303-1021
USE FROM
Plib_class_reference_arm;
--
ISO/TS 10303-1291
USE FROM
Product_view_definition_arm;
--
ISO/TS 10303-1019
(*
NOTE 1
The schemas referenced above are specified in the following
part of ISO 10303:
| Classification_assignment_arm |
ISO/TS 10303-1114 |
| Extended_measure_representation_arm |
ISO/TS 10303-1106 |
| Independent_property_arm |
ISO/TS 10303-1036 |
| Identification_assignment_arm |
ISO/TS 10303-1021 |
| Plib_class_reference_arm |
ISO/TS 10303-1291 |
| Product_view_definition_arm |
ISO/TS 10303-1019 |
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 classification_item_extended type is an extension
of the
classification_item type.
It adds the data
type
classified_element_select
to the list of alternate data types.
NOTE The list of entity data types may be
extended in application modules that use the constructs of
this module.
EXPRESS specification:
*)
TYPE
classification_item_extended =
EXTENSIBLE
GENERIC_ENTITY
SELECT
BASED_ON
classification_item
WITH
(classified_element_select);
END_TYPE;
(*
The classified_element_select type is an
extensible list of alternate data types
that allows for the designation of the data
types Product, Product_version, and Product_view_definition.
NOTE
The list of entity data types may be
extended in application modules that use the constructs of
this module.
EXPRESS specification:
*)
TYPE
classified_element_select =
EXTENSIBLE
GENERIC_ENTITY
SELECT
(Product,
Product_version,
Product_view_definition);
END_TYPE;
(*
The definable_objects type allows for the designation of the data
types
Product, Product_version, and Product_view_definition.
EXPRESS specification:
*)
TYPE
definable_objects =
SELECT
(Product,
Product_version,
Product_view_definition);
END_TYPE;
(*
The external_class_select type allows for the designation of the data
types
Plib_class_reference and External_class.
EXPRESS specification:
*)
TYPE
external_class_select =
SELECT
(Plib_class_reference,
External_class);
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 Class_hierarchy is a hierarchical relationship between two instances of
Class_with_attributes.
NOTE
The Class_hierarchy is used to build up hierarchical structures of
Class_with_attributes
instances.
EXAMPLE
With
Class_with_attributes,
part families such as screws can be classified.
Additionally subclasses can be built and linked to the super-category screws, such as machine screw or self-tapping screw.
EXPRESS specification:
*)
ENTITY Class_hierarchy;
super_class : Class_with_attributes;
sub_class : Class_with_attributes;
END_ENTITY;
(*
Attribute definitions:
super_class:
the higher level of
Class_with_attributes
in a Class_hierarchy that includes the sub class.
sub_class:
the lower level of
Class_with_attributes
in a Class_hierarchy that is included in the super class.
A Class_with_attributes is a type of
Class that may be defined with a set of valued parameters.
EXAMPLE 1
A standard type of screws can be classified according to its head type, its diameter and its length.
EXPRESS specification:
*)
ENTITY Class_with_attributes
SUBTYPE OF (Class);
version_id :
OPTIONAL
STRING;
used_classification_system :
OPTIONAL
Classification_system;
INVERSE
characterization_attributes : SET[0:?] OF Classification_attribute FOR characterized_class;
END_ENTITY;
(*
Attribute definitions:
version_id:
the identification of a particular version of a Class_with_attributes. The value of the attribute need not be specified.
used_classification_system:
the
Classification_system
that contains the information about the definition of the classification and how to interpret the name of the Class_with_attributes.
The value of the attribute need not be specified.
EXAMPLE 2
For facilitating an effective part retrieval for slotted screws, several instances of Class_with_attributes
may be defined to classify screws:
- A Class_with_attributes *1 with description 'slotted screws' and the following three subclasses,
- A Class_with_attributes *2 with description 'slotted cheese head screws - product grade A',
- A Class_with_attributes *3 with description 'slotted pan head screws - product grade A', and
- A Class_with_attributes *4 with description 'slotted countersunk flat head screws - product grade A'.
Each of these instances is based on a
Classification_system
that further defines where the definition of the classification comes from.
For *1, this is a company internal
Classification_system
for 'screw classes'.
For the other instances, these are
Classification_system
instances identifying ISO standards, namely for *2 'ISO 1207', for *3 'ISO 1580', and for *4 'ISO 2009'.
characterization_attributes:
the
Classification_attribute
instances that characterize the Class_with_attributes.
EXAMPLE 3
According to ISO 1207, the Class_with_attributes *2 has the attributes *11 with id 'd' and name 'thread',
*12 with id 'l' and name 'nominal length', *13 with id 'mechanical properties' and name 'property class', and so on.
The possible values 'M1.6', 'M2', ..., 'M10' for
Classification_attribute
*11 may be defined as instances of a subtype of
Measure_item.
The thread class name, 'M1.6', 'M2', ..., is represented within the name attribute of the referenced instances of
Measure_item.
A Classification_association is a type of
Classification_assignment
that associates a
Class_with_attributes
with product or activity data.
EXPRESS specification:
*)
ENTITY Classification_association
SUBTYPE OF (Classification_assignment);
SELF\Classification_assignment.assigned_class : Class_with_attributes;
definitional : LOGICAL;
WHERE
WR1: NOT(definitional = TRUE) OR
(SIZEOF(QUERY(it<* SELF\Classification_assignment.items |
NOT('CLASSIFICATION_WITH_ATTRIBUTES_ARM.DEFINABLE_OBJECTS' IN TYPEOF(it)) )) = 0);
WR2: SIZEOF(QUERY(it<* SELF\Classification_assignment.items |
NOT('CLASSIFICATION_WITH_ATTRIBUTES_ARM.CLASSIFIED_ELEMENT_SELECT' IN TYPEOF(it)) )) =0;
END_ENTITY;
(*
Attribute definitions:
assigned_class:
the
Class_with_attributes
instance that provides classification information.
definitional:
a logical value that specifies whether a
Class_with_attributes
serves as definition of the classified element.
A value of 'true' indicates that the
Class_with_attributes
is definitional.
Formal propositions:
WR1:
When definitional is true, the
Class_with_attributes
shall be assigned to instances of type
definable_objects.
WR2:
Only items of types listed in
classified_element_select
shall be referred to by a Classification_association.
A Classification_attribute is a characteristic of a
Class_with_attributes.
A set of values may precise the allowed values of that characteristic.
EXPRESS specification:
*)
ENTITY Classification_attribute;
id : STRING;
name :
OPTIONAL
STRING;
description :
OPTIONAL
STRING;
allowed_values :
OPTIONAL
SET[1:?] OF Measure_item;
characterized_class : Class_with_attributes;
attribute_definition : Independent_property;
END_ENTITY;
(*
Attribute definitions:
id:
the identifier of the Classification_attribute.
This identifier shall be unique within the scope of the associated
Class_with_attributes.
name:
the word or group of words by which the Classification_attribute is referred to.
The value of the attribute need not be specified.
EXAMPLE
'length', 'width', or 'radius' are examples for the name of a Classification_attribute.
description:
a text that provides additional information about the Classification_attribute. The value of the attribute need not be specified.
allowed_values:
the set of instances of
Measure_item
that specify the allowed values of the Classification_attribute.
The value of the attribute need not be specified.
NOTE
The values may be specified as single values or value ranges.
characterized_class:
the
Class_with_attributes
of which the Classification_attribute defines a characteristic.
attribute_definition:
specifies a role of the
Independent_property
for the Classification_attribute.
A Classification_system is a schema defining classifications of product or activity data.
EXAMPLE
A dictionary collecting the conventional definitions of technical properties is an example of Classification_system.
EXPRESS specification:
*)
ENTITY Classification_system;
id : STRING;
description :
OPTIONAL
STRING;
END_ENTITY;
(*
Attribute definitions:
id:
the identifier of the Classification_system.
description:
a text that provides additional information about the Classification_system. The value of the attribute need not be specified.
An External_class_with_attributes is a type of
Class_with_attributes
that is defined in an external library.
EXAMPLE
The classification may be defined in an ISO 13584 compliant library (PLIB).
In this case, the External_class_with_attributes references as a classification source a
Plib_class_reference
that has an id corresponding to the class BSU, that is a world wide unique identification of that class as defined according
to ISO 13584-42.
EXPRESS specification:
*)
ENTITY External_class_with_attributes
SUBTYPE OF (Class_with_attributes);
source : external_class_select;
END_ENTITY;
(*
Attribute definitions:
source:
the
Plib_class_reference
or
External_class
that identifies the external specification of the External_class_with_attributes.
*)
END_SCHEMA; -- Classification_with_attributes_arm
(*
© ISO 2019 — All rights reserved
