representing_breakdown_element

Template:— representing_breakdown_element_realization (rep_bkdn_elem_real)
Capability:representing_breakdown_structure

Date: 2008/02/29 18:15:49
Revision: 1.2

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

This section specifies the template representing_breakdown_element_realization.

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 a realization of a Breakdown element.

NOTE This template deprecates the usage of Breakdown_element_realization.

Model diagrams

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

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

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

Figure 2 — The graphical representation of the representing_breakdown_element_realization template

Input parameters

The following input parameters are defined for this template:

breakdown (Type= 'ENTITY (Breakdown_element_definition)' )

The breakdown item.

product (Type= 'ENTITY (Product_view_definition)' )

The product item.

class_name (Type='CLASS')

The name of the External_class that determines the role of the breakdown element realization.

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

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

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

The identification of the External_class_library storing the External_class given by the input parameter @class_name.

Reference parameters

The following reference parameters are defined for this template:

bkdn_elem_real(Type='ENTITY (View_definition_usage)')

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

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

%^target = $representing_breakdown_element_realization.bkdn_elem_real%

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

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.

-- Create the View_definition_usage entity and its reference param
View_definition_usage
%^bkdn_elem_real = View_definition_usage%

-- Set the attributes
View_definition_usage.id = '/IGNORE'
View_definition_usage.relation_type = '/IGNORE'
View_definition_usage.description = '/IGNORE'
View_definition_usage.relating_view -> @breakdown
View_definition_usage.related_view -> @product

-- Assign the External_class in the reference data library
-- being used to determine type of breakdown element realization
/assigning_reference_data(
    items=^bkdn_elem_real,
    class_name=@class_name,
    ecl_id=@class_ecl_id)/

The following entities are instantiated with attributes as specified:

Entity in path	Value	Inherited from
View_definition_usage.id	'/IGNORE'	View_definition_relationship.id
View_definition_usage.relation_type	'/IGNORE'	View_definition_relationship.relation_type
View_definition_usage.description	'/IGNORE'	View_definition_relationship.description

Instance diagrams

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

/representing_breakdown_element_realization(breakdown='#1', product='#2', class_name='Breakdown_element_realization', ecl_id='urn:plcs:rdl:std')/

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

Figure 3 — Entities instantiated by representing_breakdown_element_realization template

The instance model in STEP ASCII exchange file format (ISO 10303 Part 21 syntax) is:


          #1 = BREAKDOWN_ELEMENT_DEFINITION('/IGNORE','/IGNORE','/IGNORE',$,(),$);
          #2 = PART_VIEW_DEFINITION('/IGNORE','/IGNORE','/IGNORE',$,(),$);
          #3 = VIEW_DEFINITION_USAGE('/IGNORE','/IGNORE','/IGNORE',#1,#2);
          #5 = CLASSIFICATION_ASSIGNMENT(#6,(#3),'/IGNORE');
          #6 = EXTERNAL_CLASS('/NULL','Breakdown_element_realization','/IGNORE',#7);
          #7 = EXTERNAL_CLASS_LIBRARY('urn:plcs:rdl:std','/IGNORE');

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:

/representing_breakdown_element_realization(breakdown='#1', product='#2', class_name='Breakdown_element_realization', ecl_id='urn:plcs:rdl:std')/

Figure 4 — Instantiation of representing_breakdown_element_realization template

Characterizations

No common characterizations of the template representing_breakdown_element_realization have been identified. However, the ISO 10303-239 EXPRESS model may enable other assignments to the entities instantiated by the template.