assigning_condition

Template:— assigning_condition_parameter (asg_cond_para)
Capability:representing_condition

Date: 2010/11/28 21:13:41
Revision: 1.1

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

This section specifies the template assigning_condition_parameter.

NOTE The template has been defined in the context of the capability representing_condition 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 assignment of a condition parameter to a condition.

Model diagrams

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

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

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 assigning_condition_parameter template

Input parameters

The following input parameters are defined for this template:

cond (Type= 'ENTITY (Condition)' )

The condition to which the condition parameter is assigned.

param (Type= 'SELECT (condition_parameter_item)' )

The item that is used as a condition parameter.

param_class_name (Type='CLASS')

The name of the External_class used to classify the condition parameter, and so provide the role of the condition parameter.

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

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

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

The identifier of the External_class_library that stores the definition of the External_class referenced by parameter @param_class_name.

Reference parameters

The following reference parameters are defined for this template:

cond_param(Type='ENTITY (Condition_parameter)')

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

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

%^target = $assigning_condition_parameter.cond_param%

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

Uniqueness constraints

The following parameter combinations specify a uniqueness constraint:

Unique constraint: Condition parameter

Each instance of the entity (Condition_parameter) within the data set shall be uniquely identified by a combination of the following parameters on this template (assigning_condition_parameter) namely: cond, param, param_class_name, param_class_ecl_id.
The instance is referenced by the following template parameter: cond_param.

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.

Condition_parameter
%^cond_param = Condition_parameter%
Condition_parameter.name = '/IGNORE'
Condition_parameter.description = '/IGNORE'
Condition_parameter.condition -> @cond
Condition_parameter.parameter -> @param

-- provide the role of the Condition_parameter
/assigning_reference_data(
    items=^cond_param,
    class_name=@param_class_name,
    ecl_id=@param_class_ecl_id)/

The following entities are instantiated with attributes as specified:

Entity in path	Value	Inherited from
Condition_parameter.name	'/IGNORE'	—
Condition_parameter.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:

/assigning_condition_parameter(cond='#1', param='#2', param_class_name='Trigger', param_ecl_id='urn:plcs:rdl:sample')/

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

Figure 3 — Entities instantiated by assigning_condition_parameter template

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


          #1 = CONDITION('/IGNORE','/IGNORE');
          #2 = INDEPENDENT_PROPERTY('/IGNORE','/IGNORE','/IGNORE');
          #3 = CONDITION_PARAMETER('/IGNORE','/IGNORE',#1,#2);
          #5 = CLASSIFICATION_ASSIGNMENT(#6,(#3),'/IGNORE');
          #6 = EXTERNAL_CLASS('/NULL','Trigger','/IGNORE',#7);
          #7 = EXTERNAL_CLASS_LIBRARY('urn:plcs:rdl:sample','/IGNORE');

The instance model in STEP XML exchange file format (ISO 10303 Part 28 ed.2 syntax) is:

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:

/assigning_condition_parameter(cond='#1', param='#2', param_class_name='Trigger', param_ecl_id='urn:plcs:rdl:sample')/

Figure 4 — Instantiation of assigning_condition_parameter template

Characterizations

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