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Application module:
Assembly structure |
ISO/TS 10303-1026:2019(E)
© ISO
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This clause specifies the information requirements for the
Assembly structure
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
Assembly_structure_arm
schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Assembly_structure_arm;
(*
The following EXPRESS interface statements specify the elements
imported from the ARMs of other application modules.
EXPRESS specification:
*)
USE FROM
Product_view_definition_arm;
--
ISO/TS 10303-1019
USE FROM
Product_view_definition_reference_arm;
--
ISO/TS 10303-1823
USE FROM
Value_with_unit_arm;
--
ISO/TS 10303-1054
(*
NOTE 1
The schemas referenced above are specified in the following
part of ISO 10303:
| Product_view_definition_arm |
ISO/TS 10303-1019 |
| Product_view_definition_reference_arm |
ISO/TS 10303-1823 |
| Value_with_unit_arm |
ISO/TS 10303-1054 |
NOTE 2
See Annex C,
Figures
C.1and C.2
for a graphical representation of this schema.
This subclause specifies the ARM type
for this application module. The ARM type and
definition is specified below.
The product_view_definition_or_reference type allows for the designation of the data
types
Product_view_definition and Generic_product_view_definition_reference.
EXPRESS specification:
*)
TYPE
product_view_definition_or_reference =
SELECT
(Product_view_definition,
Generic_product_view_definition_reference);
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 Assembly_component_relationship is a type of
Product_occurrence_definition_relationship.
It identifies a possibly quantified usage of a product version as a component of another product version.
The relationship is established between two
Product_view_definitions
The inherited attribute
relating_view
identifies the
Product_view_definition
of the assembly.
The inherited attribute
related_view
identifies the
Product_view_definition
of the product version that plays the role of component.
The Assembly_component_relationship specifies that, in the
initial_context
of the
Product_view_definition
that is referred to as
relating_view,
it is considered that the product version that is indirectly identified with the
related_view
attribute, is a component of the product version that is indirectly identified with the
relating_view
attribute.
NOTE 1
In another context, the structure of the assembly may be described differently, adding,
for example, an intermediate level between the products.
NOTE 2
This entity data type may be used to establish assembly relationships during design or to represent the composition of an
assembly existing
in the real world.
An Assembly_component_relationship is either a
Multi_level_reference_designator, a
Next_assembly_usage, a
Promissory_usage
or a
Component_upper_level_identification.
EXPRESS specification:
*)
ENTITY Assembly_component_relationship
ABSTRACT SUPERTYPE
OF (ONEOF (Multi_level_reference_designator,
Next_assembly_usage,
Promissory_usage,
Component_upper_level_identification))
SUBTYPE OF (Product_occurrence_definition_relationship);
location_indicator :
OPTIONAL
STRING;
quantity :
OPTIONAL
Value_with_unit;
WHERE
WR1: NOT(EXISTS(quantity)) OR ((NOT ('NUMBER' IN TYPEOF(quantity.value_component))) XOR (quantity.value_component > 0));
END_ENTITY;
(*
Attribute definitions:
location_indicator:
the text that identifies this usage of the component in the assembly in a diagram, list, chart, or on a physical piece of
equipment. The value of this attribute need not be specified.
quantity:
the Value_with_unit that defines the amount of this usage of the component in the assembly. The value of this attribute need not be specified.
Formal propositions:
WR1:
If it is specified and if its value is expressed with a number, the quantity value shall be greater than zero.
A Component_upper_level_identification is a type of
Assembly_component_relationship.
It identifies a component of an assembly with respect to an upper level in the assembly structure.
NOTE
A
Component_upper_level_identification
does not add a component in an assembly; it provides a means to further characterize a component with respect to an upper
level assembly.
EXAMPLE
A
Component_upper_level_identification
may be used to assign a property to a component that applies in the context of a particular upper level assembly.
The identified component is the version of product, indirectly referred to as the
related_view
of the sub_assembly_relationship.
The upper level assembly is the version of product, indirectly referred to as the
relating_view
of the upper_assembly_relationship.
EXPRESS specification:
*)
ENTITY Component_upper_level_identification
SUBTYPE OF (Assembly_component_relationship);
upper_assembly_relationship : Assembly_component_relationship;
sub_assembly_relationship : Next_assembly_usage;
UNIQUE
UR1: upper_assembly_relationship, sub_assembly_relationship;
WHERE
WR1: SELF :<>: upper_assembly_relationship;
WR2: SELF\Product_occurrence_definition_relationship.relating_view :=: upper_assembly_relationship\Product_occurrence_definition_relationship.relating_view;
WR3: SELF\Product_occurrence_definition_relationship.related_view :=: sub_assembly_relationship\Product_occurrence_definition_relationship.related_view;
WR4: (upper_assembly_relationship\Product_occurrence_definition_relationship.related_view :=: sub_assembly_relationship\Product_occurrence_definition_relationship.relating_view)
OR (SIZEOF (QUERY (pdr <* USEDIN (upper_assembly_relationship\Product_occurrence_definition_relationship.related_view , 'ASSEMBLY_STRUCTURE_ARM.PRODUCT_OCCURRENCE_DEFINITION_RELATIONSHIP.RELATED_VIEW')
| pdr.relating_view :=: sub_assembly_relationship\Product_occurrence_definition_relationship.relating_view)) = 1);
WR5: SIZEOF (['ASSEMBLY_STRUCTURE_ARM.NEXT_ASSEMBLY_USAGE', 'ASSEMBLY_STRUCTURE_ARM.COMPONENT_UPPER_LEVEL_IDENTIFICATION']
* TYPEOF(upper_assembly_relationship)) = 1;
END_ENTITY;
(*
Attribute definitions:
upper_assembly_relationship:
the
Assembly_component_relationship
that identifies indirectly the upper level assembly in the context of which the component is identified.
sub_assembly_relationship:
the
Next_assembly_usage
that identifies indirectly the component that is further characterized by the
Component_upper_level_identification.
Formal propositions:
UR1:
The couple of the upper_assembly_relationship and sub_assembly_relationship attributes shall be unique within a population of the
Component_upper_level_identification.
WR1:
The upper_assembly_relationship shall not refer to the
Component_upper_level_identification.
WR2:
The
relating_view
attribute of the
Component_upper_level_identification
shall reference the same instance of
Product_view_definition
as the
relating_view
of the upper_assembly_relationship.
WR3:
The
related_view
of the
Component_upper_level_identification
shall reference the same instance of
Product_view_definition
as the
related_view
for the sub_assembly_relationship.
WR4:
The
related_view
of the upper_assembly_relationship shall refer to, or be transitively related to, the same instance of
Product_view_definition
as the
relating_view
for the sub_assembly_relationship.
WR5:
The upper_assembly_relationship shall be an instance of either
Next_assembly_usage
or of
Component_upper_level_identification.
A Multi_level_reference_designator is a type of
Assembly_component_relationship
that specifies the relationship between an assembly and a constituent if the assembly is not the immediate parent for the
constituent
and there are several hierarchical levels between the assembly and the constituent.
The hierarchical levels are defined by a list of
Next_assembly_usage
that identifies a connected path in the assembly structure.
NOTE
The
Multi_level_reference_designator
is used to identify a specific instance of a component within a
multi-level assembly structure for which certain properties are to be associated.
EXPRESS specification:
*)
ENTITY Multi_level_reference_designator
SUBTYPE OF (Assembly_component_relationship);
location : LIST[1:?] OF
UNIQUE
Next_assembly_usage;
DERIVE
SELF\Product_occurrence_definition_relationship.relating_view RENAMED root_node : Product_view_definition := location[1]\Product_occurrence_definition_relationship.relating_view;
SELF\Product_occurrence_definition_relationship.related_view RENAMED leaf_node : product_view_definition_or_reference := location[HIINDEX(location)]\Product_occurrence_definition_relationship.related_view;
UNIQUE
UR1: location;
END_ENTITY;
(*
Attribute definitions:
location:
specifies the ordered list of connected
Next_assembly_usage
that defines an unambiguous path from the assembly to the constituent.
root_node:
specifies the node in the assembly structure where the path starts.
leaf_node:
specifies the node in the assembly structure where the path ends.
Formal propositions:
UR1:
The
location
shall be unique across all instances of
Multi_level_reference_designator.
A Next_assembly_usage is a type of Assembly_component_relationship.
It establishes a relationship between a component and its immediate parent assembly in a product structure.
EXPRESS specification:
*)
ENTITY Next_assembly_usage
SUBTYPE OF (Assembly_component_relationship);
END_ENTITY;
(*
A Product_occurrence_definition_relationship is an occurrence relationship between two instances of
Product_view_definition.
EXPRESS specification:
*)
ENTITY Product_occurrence_definition_relationship
ABSTRACT SUPERTYPE
;
relating_view : product_view_definition_or_reference;
related_view : product_view_definition_or_reference;
shape_type :
OPTIONAL
contextual_shape_type_enumeration;
primary_shape_representation :
OPTIONAL
shape_model;
auxiliary_shape_representations :
OPTIONAL
SET[1:?] OF shape_model;
WHERE
WR1: NOT (EXISTS(auxiliary_shape_representations)) OR EXISTS(primary_shape_representation);
END_ENTITY;
(*
Attribute definitions:
relating_view:
one of the instances of
Product_view_definition
that is a part of the relationship.
related_view:
the other instance of
Product_view_definition
that is part of the relationship.
If one element of the relationship is dependent upon the other, this attribute shall be the dependent one.
shape_type:
specified the kind of shape.
The value of this attribute need not be specified.
primary_shape_representation:
specifies the primary
shape_model
that represents the shape of the Product_occurrence_definition_relationship.
The value of this attribute need not be specified.
auxiliary_shape_representations:
specifies additional
shape_models
that represents the shape of the Product_occurrence_definition_relationship for auxiliary purposes.
The value of this attribute need not be specified.
Formal propositions:
WR1:
If auxiliary_shape_representations is provided then primary_shape_representation shall be provided.
A Promissory_usage
is a type of Assembly_component_relationship.
It establishes a relationship between an assembly and a component, regardless of the number of intermediate levels between
them, which may be established with instances of Next_assembly_usage.
NOTE
A
Promissory_usage
may be used when the product structure is not completely defined, to capture the intent that the constituent will
be used in that assembly.
EXPRESS specification:
*)
ENTITY Promissory_usage
SUBTYPE OF (Assembly_component_relationship);
END_ENTITY;
(*
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 assembly_component_relationship_constraint constraint specifies a constraint that applies to instances of subtypes of
Assembly_component_relationship.
If the
Assembly_component_relationship
is used, it must be one of the subtypes
Component_upper_level_identification,
Next_assembly_usage,
Promissory_usage.
EXPRESS specification:
*)
SUBTYPE_CONSTRAINT assembly_component_relationship_constraint FOR Assembly_component_relationship;
ABSTRACT SUPERTYPE;
TOTAL_OVER (Component_upper_level_identification,
Multi_level_reference_designator,
Next_assembly_usage,
Promissory_usage);
END_SUBTYPE_CONSTRAINT;
(*
*)
END_SCHEMA; -- Assembly_structure_arm
(*
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