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Application module:
Altered package |
ISO/TS 10303-1601:2018-11(E)
© ISO
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This clause specifies the information requirements for the
Altered package
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
Altered_package_arm
schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Altered_package_arm;
(*
The following EXPRESS interface statements specify the elements
imported from the ARMs of other application modules.
EXPRESS specification:
*)
USE FROM
Package_arm;
--
ISO/TS 10303-1707
REFERENCE FROM
Specification_document_arm
--
ISO/TS 10303-1747
(get_document_definition);
(*
NOTE 1
The schemas referenced above are specified in the following
part of ISO 10303:
| Package_arm |
ISO/TS 10303-1707 |
| Specification_document_arm |
ISO/TS 10303-1747 |
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 ap_documented_element_select type is an extension
of the
documented_element_select type.
It adds the data
type
Surface_prepped_terminal
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
ap_documented_element_select =
EXTENSIBLE
GENERIC_ENTITY
SELECT
BASED_ON
documented_element_select
WITH
(Surface_prepped_terminal);
END_TYPE;
(*
The ap_external_identification_item type is an extension
of the
external_identification_item type.
It adds the data
type
Altered_package
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
ap_external_identification_item =
EXTENSIBLE
GENERIC_ENTITY
SELECT
BASED_ON
external_identification_item
WITH
(Altered_package);
END_TYPE;
(*
A predefined_geometric_status lists the possible values of the geometric status.
NOTE 1
The predefined_geometric_status is not a complete
specification of the transformation required to convert one geometric
model to another because some of the constraints on the transformation are specified
as constraints on the geometric relationship between the package terminals and the seating plane.
EXAMPLE 1
A two pin package that is defined with both pins intersecting the seating plane in the unaltered package
will need to have both pins intersect the seating plane in the altered state of the Package.
The exact length
and other geometric properties of the pins in the altered state will be different from pins in the unaltered state
if the orientation is different in the altered state of the Package
from the unaltered state of the Package.
NOTE 2
The selection of datum axis or datum plane as the condition whose state is conveyed
depends on the geometric classification of the Package.
EXAMPLE 2
A pre-processor considering application for a cylindrical package with the terminals protruding
from the Package on axis would use a
datum axis as the predefined_geometric_status if a value other than undefined or
standard_datum_condition were to be specified because the central axis of symmetry is
normally considered a
Axis_placement_shape_element.
EXAMPLE 3
A pre-processor considering application for a cuboid Package that has terminals protruding
from only one face would use a datum plane as the predefined_geometric_status if a value other than undefined or
standard_datum_condition were to be specified because the face that has the terminals
is typically considered a datum plane.
EXPRESS specification:
*)
TYPE
predefined_geometric_status =
ENUMERATION
OF
(undefined,
standard_datum_condition,
perpendicular_primary_datum_axis,
perpendicular_primary_datum_plane);
END_TYPE;
(*
Enumerated item definitions:
undefined:
specifies that the geometric status is not defined.
NOTE 3
This option is provided for the case where the authoring application does not itself contain the geometric status but a valid
model is desired.
EXAMPLE 4
A Product Data Management system may store the geometric status in a structure separate from the model.
standard_datum_condition:
specifies that the geometric status is a standard datum condition. The standard datum condition shall be interpreted that
the orientation of the
Package in the
altered state is identical to the orientation of the
Package in the unaltered state.
perpendicular_primary_datum_axis:
specifies that the geometric status is that the primary datum axis of the modified Package
is perpendicular to the primary datum axis
of the unmodified Package.
perpendicular_primary_datum_plane:
specifies that the geometric status is that the primary datum plane of the modified Package
is perpendicular to the primary datum plane
of the unmodified Package.
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 Altered_package is a type of
Package.
An Altered_package describes a
Package
that has been modified in some manner from a reference
Package.
The material or shape properties of the Altered_package are different from the reference
Package.
NOTE 1
The reference information provided by package_to_be_altered is used for traceability information and is
not used for definitional purposes.
EXAMPLE 1
Examples of alteration include trimming of the terminals, prebending of the terminals, tinning of the
terminals for solderability, or more than one of these.
EXAMPLE 2
Figure 1 illustrates some of the different forms a
Package may take when it is installed into an assembly.
For illustration purposes, the original form on the left is in the role of package_to_be_altered for the forms on the right.
The altered forms are identified and tracked by an enterprise.
Figure 1 — Altered package
NOTE 2
Most Altered_packages are a result of terminal alteration.
NOTE 3
Although Figure 1 illustrates Package alteration of axially leaded packages with a
starting condition of terminals central axis congruent with the central axis of the body,
two dimensional CAD interconnect layout systems typically ignore that condition because there are no terminals intersecting
with the seating plane in that condition.
To use this part of ISO 10303 to communicate information about an altered state, at least one of the terminals of a modified
Package
should intersect a seating plane.
EXPRESS specification:
*)
ENTITY Altered_package
SUBTYPE OF (Package);
of_geometric_status :
OPTIONAL
predefined_geometric_status;
modified_terminal_separation :
OPTIONAL
Length_data_element;
package_to_be_altered : Package;
INVERSE
of_external_geometric_status : SET[0:1] OF External_source_identification FOR item;
WHERE
WR1: (EXISTS (of_geometric_status)) XOR ((SIZEOF(of_external_geometric_status)) = 1);
WR2: NOT EXISTS(SELF\Product_view_definition.name);
END_ENTITY;
(*
Attribute definitions:
of_geometric_status:
specifies the
predefined_geometric_status
of the package. A value of
undefined
is to be interpreted as the geometric status is not available. A value of
standard_datum_condition
is to be interpreted as the primary orientation feature orientation is unmodified from that in the package_to_be_altered.
A value of perpendicular_primary_datum_axis
is to be interpreted as stating that the primary datum axis is perpendicular to that in the package_to_be_altered.
A value of perpendicular_primary_datum_plane
is to be interpreted as stating that the primary datum plane is perpendicular to that in the package_to_be_altered.
The value of this attribute need not be specified.
modified_terminal_separation:
specifies the role of the
Length_data_element
for the Altered_package. The value of this attribute need not be specified.
package_to_be_altered:
specifies the
Package
that is a reference for the Altered_package.
of_external_geometric_status:
specifies an inverse relationship that specifies that the existence of the Altered_package is dependent on the existence of the
External_source_identification
that specifies the Altered_package as its
item.
Formal propositions:
WR1:
Either the of_geometric_status or of_external_geometric_status shall be provided, but not both.
WR2:
The
name
shall not be populated.
An Altered_package_terminal is a type of
Package_terminal.
An Altered_package_terminal is one or more of a
Shape_formed_terminal,
or a
Surface_prepped_terminal
or additionally may be a
Length_trimmed_terminal.
An Altered_package_terminal describes a
Package_terminal
that is the result of a modification process. Material or shape properties are different from the reference terminal.
EXAMPLE
The modification process may be performed prior to installing the
occurrence of the
Packaged_part
onto a Printed circuit board.
EXPRESS specification:
*)
ENTITY Altered_package_terminal
ABSTRACT SUPERTYPE
OF ((Shape_formed_terminal
ANDOR Surface_prepped_terminal)
ANDOR Length_trimmed_terminal)
SUBTYPE OF (Package_terminal);
terminal_to_be_altered : Package_terminal;
SELF\Part_feature.associated_definition : Altered_package;
END_ENTITY;
(*
Attribute definitions:
terminal_to_be_altered:
specifies the
Package_terminal
that will be modified for the Altered_package_terminal.
associated_definition:
specifies the role of the
Altered_package
for the Altered_package_terminal.
A Length_trimmed_terminal is a type of
Altered_package_terminal.
A Length_trimmed_terminal describes the prepared length of a
terminal accomplished prior to its assembly to the printed circuit assembly. The prepared length is equivalent to the as-delivered
length.
EXPRESS specification:
*)
ENTITY Length_trimmed_terminal
SUBTYPE OF (Altered_package_terminal);
trimmed_length : Length_tolerance_characteristic;
END_ENTITY;
(*
Attribute definitions:
trimmed_length:
specifies the
Length_tolerance_characteristic
for the shortest finished length of the Length_trimmed_terminal.
A Shape_formed_terminal is a type of a
Altered_package_terminal
that defines the result of a modification of its shape from its original
Package_terminal
shape. This shape modification is done in order to facilitate the installation of a
Packaged_part
in an assembly.
EXPRESS specification:
*)
ENTITY Shape_formed_terminal
SUBTYPE OF (Altered_package_terminal);
END_ENTITY;
(*
A Surface_prepped_terminal is a type of
Altered_package_terminal
that defines the result of a modification to its surface condition, for solderability or other reasons, prior to its installation
on an
Interconnect_module_component
during the assembly of a
Layered_assembly_module_design_view.
EXPRESS specification:
*)
ENTITY Surface_prepped_terminal
SUBTYPE OF (Altered_package_terminal);
DERIVE
surface_preparation : SET[1:1] OF Document_definition := get_document_definition(SELF, 'surface preparation',
'SPECIFICATION_DOCUMENT_ARM.SURFACE_FINISH_SPECIFICATION');
END_ENTITY;
(*
Attribute definitions:
surface_preparation:
specifies the
Surface_finish_specification
for modification to the surface finish of the Surface_prepped_terminal.
*)
END_SCHEMA; -- Altered_package_arm
(*
© ISO 2018 — All rights reserved
