representing_system

Template:— representing_system_breakdown (repr_sys_bkdn)
Capability:representing_breakdown_structure

Date: 2007/09/28 12:44:09
Revision: 1.7

Cover Contents Description Model diags.Input params.Ref. params.Instantiation path Instance diags.Characterizations Issues in situ

This section specifies the template representing_system_breakdown.

NOTE The template has been defined in the context of the capability representing_breakdown_structure which provides an overall description of the relevant parts of the ISO 10303-239 information model and a description of related templates.

NOTE An explanation of a template and the associated instantiation path is provided in the Template overview section.

Description

This template describes how to represent the decomposition of systems.

Model diagrams

The EXPRESS-G diagram in Figure 1 shows the templates and EXPRESS entities that are required to represent the template "representing_system_breakdown". The text highlighted in blue shows the template parameters.

Templates within grey areas and templates with dashed outlines are not included in the template, but may be used to further characterize the template.

Figure 1 — An EXPRESS-G representation of the Information model for representing_system_breakdown

The graphic for the template to be used in other EXPRESS-G diagrams is shown in Figure 2 below.

Templates within grey areas and templates with dashed outlines are not included in the template, but may be used to further characterize the template.

Figure 2 — The graphical representation of the representing_system_breakdown template

Input parameters

The following input parameters are defined for this template:

id (Type='STRING')

The identifier of the System_breakdown.

id_class_name (Default=Breakdown_name,Type='CLASS')

The name of the class used to classify the identification (Identification_assignment) of the system breakdown. This provides the role or reason for the identification.

The following classes and their sub-classes can be used:

classifications: "Breakdown_identification_code" (urn:plcs:rdl:std:Breakdown_identification_code), "Breakdown_name" (urn:plcs:rdl:std:Breakdown_name)

id_ecl_id (Default=urn:plcs:rdl:std,Type='URN')

The identifier of the External_class_library storing the definition of the class referenced by the parameter @id_class_name class.

id_owner (Type='STRING')

The name or identifier of the organization that is responsible for naming or idenfying the system breakdown.

id_owner_class_name (Default=Organization_name,Type='CLASS')

The name of the class used to classify the identification of the organization. For example, the organization might be identified using a CAGE code or using a name.

The following classes and their sub-classes can be used:

classifications: "Organization_identification_code" (urn:plcs:rdl:std:Organization_identification_code), "Organization_name" (urn:plcs:rdl:std:Organization_name)

id_owner_ecl_id (Default=urn:plcs:rdl:std,Type='URN')

The id of the External_class_library storing the @id_owner_class_name class

bkdn_type (Type='CLASS')

The name of the class used to classify the System_breakdown.

The following classes and their sub-classes can be used:

classifications: "System_breakdown" (urn:plcs:rdl:std:System_breakdown)

bkdn_type_ecl_id (Default=urn:plcs:rdl:std,Type='URN')

The identifier of the External_class_library storing the definition of the class referenced by the parameter @bkdn_type class.

vn_id (Default=Unknown,Type='STRING')

The identifier of the System_breakdown_version.

vn_id_class_name (Default=Version_identification_code,Type='CLASS')

The name of the class used to classify the identification (Identification_assignment) of the system breakdown version. This provides the role or reason for the identification.

The following classes and their sub-classes can be used:

classifications: "Version_identification_code" (urn:plcs:rdl:std:Version_identification_code)

vn_id_ecl_id (Default=urn:plcs:rdl:std,Type='URN')

The identifier of the External_class_library storing the definition of the class referenced by the parameter @vn_id_class_name class.

vn_id_owner (Default=Unknown,Type='STRING')

The name or identifier of the organization responsible for identifying the system breakdown version.

vn_id_owner_class_name (Default=Organization_name,Type='CLASS')

The name of the class used to classify the identification of the organization. For example, the organization might be identified using a CAGE code or using a name.

The following classes and their sub-classes can be used:

classifications: "Organization_identification_code" (urn:plcs:rdl:std:Organization_identification_code), "Organization_name" (urn:plcs:rdl:std:Organization_name)

vn_id_owner_ecl_id (Default=urn:plcs:rdl:std,Type='URN')

The id of the External_class_library storing the @vn_id_owner_class_name class

of_product (Type= 'ENTITY (Product_view_definition)' )

The product that is described in terms of its component systems.

Reference parameters

The following reference parameters are defined for this template:

sys_bkdn(Type='ENTITY (System_breakdown)')

Allow the System_breakdown entity instantiated in this path to be referenced when this template is used.

Note: The System_breakdown entity can be referenced in a template path by:

%^target = $representing_system_breakdown.sys_bkdn%

where target is the parameter to which the System_breakdown is bound.

sys_bkdn_vn(Type='ENTITY (System_breakdown_version)')

Allow the System_breakdown_version entity instantiated in this path to be referenced when this template is used.

Note: The System_breakdown_version entity can be referenced in a template path by:

%^target = $representing_system_breakdown.sys_bkdn_vn%

where target is the parameter to which the System_breakdown_version is bound.

bkdn_of(Type='ENTITY (Breakdown_of)')

Allow the Breakdown_of entity instantiated in this path to be referenced when this template is used.

Note: The Breakdown_of entity can be referenced in a template path by:

%^target = $representing_system_breakdown.bkdn_of%

where target is the parameter to which the Breakdown_of is bound.

Uniqueness constraints

The following parameter combinations specify a uniqueness constraint:

Unique constraint: External id class for System_breakdown

Each instance of the entity (System_breakdown) within the data set shall be uniquely identified by a combination of the following parameters on this template (representing_system_breakdown) namely: id, id_class_name, id_ecl_id, id_owner, id_owner_class_name, id_owner_ecl_id.
The instance is referenced by the following template parameter: sys_bkdn.

Unique constraint: External id class for System_breakdown_version

Each instance of the entity (System_breakdown_version) within the data set shall be uniquely identified by a combination of the following parameters on this template (representing_system_breakdown) namely: vn_id, vn_id_class_name, vn_id_ecl_id, vn_id_owner, vn_id_owner_class_name, vn_id_owner_ecl_id.
The instance is referenced by the following template parameter: sys_bkdn_vn.

Instantiation path

The instantiation path shown below specifies the entities that are to be instantiated by the template.

A description of templates and the syntax for the instantiation path is provided in the Templates Help/Information section.

-- instantiate System_breakdown
System_breakdown
%^sys_bkdn = System_breakdown%
System_breakdown.id = '/IGNORE'
System_breakdown.name = '/IGNORE'
System_breakdown.description = '/IGNORE'

-- assign ID to System_breakdown
/assigning_identification(
    id=@id,
    id_class_name=@id_class_name,
    id_ecl_id=@id_ecl_id,
    org_id=@id_owner,
    org_id_class_name=@id_owner_class_name,
    org_id_ecl_id=@id_owner_ecl_id,
    items=^sys_bkdn)/

-- instantiate System_breakdown_version
System_breakdown_version
%^sys_bkdn_vn = System_breakdown_version%
System_breakdown_version.id = '/IGNORE'
System_breakdown_version.description = '/IGNORE'
System_breakdown_version.of_product -> System_breakdown

-- assign ID to System_breakdown_version
/assigning_identification(
    id=@vn_id,
    id_class_name=@vn_id_class_name,
    id_ecl_id=@vn_id_ecl_id,
    org_id=@vn_id_owner,
    org_id_class_name=@vn_id_owner_class_name,
    org_id_ecl_id=@vn_id_owner_ecl_id,
    items=^sys_bkdn_vn)/

-- instantiate Breakdown_of
Breakdown_of
%^bkdn_of = Breakdown_of%
Breakdown_of.id = '/IGNORE'
Breakdown_of.name = '/IGNORE'
Breakdown_of.description = '/IGNORE'
Breakdown_of.breakdown -> System_breakdown_version
Breakdown_of.of_view -> @of_product

-- assign type of breakdown to the System_breakdown
/assigning_reference_data(
    items=System_breakdown,
    class_name=@bkdn_type,
    ecl_id=@bkdn_type_ecl_id)/

The following entities are instantiated with attributes as specified:

Entity in path	Value	Inherited from
System_breakdown.id	'/IGNORE'	Product.id
System_breakdown.name	'/IGNORE'	Product.name
System_breakdown.description	'/IGNORE'	Product.description
System_breakdown_version.id	'/IGNORE'	Product_version.id
System_breakdown_version.description	'/IGNORE'	Product_version.description
Breakdown_of.id	'/IGNORE'	—
Breakdown_of.name	'/IGNORE'	—
Breakdown_of.description	'/IGNORE'	—

Instance diagrams

The instance diagram in Figure 3 shows an example of the EXPRESS entities and templates that are instantiated by the template:

/representing_system_breakdown(id='System breakdown of the bike', class_name='Breakdown_name', id_ecl_id='urn:plcs:rdl:std', id_owner='Express Delivery Inc', id_owner_class_name='Organization_name', id_owner_ecl_id='urn:plcs:rdl:std', bkdn_type='System_breakdown', bkdn_type_ecl_id='urn:plcs:rdl:sample', vn_id='A', vn_class_name='Version_identification_code', vn_id_ecl_id='urn:plcs:rdl:std', vn_id_owner='Express Delivery Inc', vn_id_owner_class_name='Organization_name', vn_id_owner_ecl_id='urn:plcs:rdl:std', of_product='#46')/

(an illustration of the consolidated representing_system_breakdown template is shown in Figure 4 below.)

Figure 3 — Entities instantiated by representing_system_breakdown template

The instance diagram in Figure 4 shows the graphic symbol for the template that is to be used in other instance diagrams. The example template is:

Figure 4 — Instantiation of representing_system_breakdown template

Characterizations

The following section details how the representing_system_breakdown template can be optionally characterized by assigning other constructs to it. These are characterizations commonly applied to the template. The ISO 10303-239 EXPRESS model may enable other assignments to the entities instantiated by the template.

The following characterizations may apply:

Characterization General

NOTE this characterization is optional.

Any Breakdown may be characterized in several ways. None of those are specific to Breakdowns, and therefore not discussed in detail here.

The following are a few examples of such general characterizations. System_breakdowns and System_breakdown_versions can be characterized by:

Activities and Activity_methods (including Task_method and Scheme).
States, e.g. for life cycle status assignments.
Date, time and effectivities.
Documents.
Organizations and persons, e.g. to identify owner or creator.
Projects and contract assignments.
Requirements.
etc.