Figure 2 shows the templates required to represent a record of a maintenance activity. The templates shown in yellow in Figure 2 are standard OASIS templates. Those shown in light green are business templates developed specifically for the MoDAvDEX context.

Further details of how to represent a record of a maintenance activity using ISO 10303 239 PLCS is provided in Aviation Maintenance DEX: Representing reportable item maintenance activity - PLCS representation.

The following mandatory templates are shown in Figure 2 and used to represent different aspects of the maintenance activity. Figure 2 also shows a number of optional templates which are described in the Characterizations section.

Template: #2 representing_work_done

The template: # representing_work_done (Figure 2) is used to represent a record of the work that has been done. It is assigned to the template: #5 MoDAvDEX.reportable_item_structure that represents the reportable item on which the work has been done.

NOTE    The template:MoDAvDEX.reportable_item_structure is used to identify the reportable item when fitted to an end item. If the reportable item is not fitted then, use the template MoDAvDEX.reportable_item.

NOTE    Some Engineering and Asset management systems version individual assets, that is a version number is associated with the asset to indicate that a change has been made to the asset. For example, when an engineering modification is made. If this is the case, the template: #5 MoDAvDEX.reportable_item_structure represents the reportable item before the change was made and template: #6 MoDAvDEX.reportable_item_structure represents the reportable item after the change was made. The work done is related to the reportable item that resulted from the change by the assigning_activity with the following values are set

Template #7,#4 (Figure 2): assigning_activity Show template parametersHide all template parametersShow all template parameters
Description

Template #7,#4 (Figure 2): assigning_activity Hide template parametersHide all template parametersShow all template parameters
Description
Parameter name:	Parameter value:	Parameter description:
role_class_name	Activity_output	The class name of the External_class corresponding to the role of the assignment, e.g. "Activity input" (urn:plcs:rdl:std:Activity input), or "Activity output" (urn:plcs:rdl:std:Activity output).
role_ecl_id	"urn:plcs:rdl:std"	The identifier of the External_class_library storing the definition of the class referenced by the parameter @role_class_name.
assigned_activity		The Directed_activity instantiated by the MoDAvDEX.work_order and the Activity_actual instantiated by the template representing_work_done the
items		the reportable item

Template: #3 MoDAvDEX.work_order

The template: #3 MoDAvDEX.work_order (Figure 2) is used to represent the work order under whose authority the work was done. See MoDAvDEX.work_order for details.

NOTE    This template is required, but is not instantiated by the template MoDAvDEX.maintenance_activity.

Template: #9 MoDAvDEX.referencing_maintenance_task

The template: #9 MoDAvDEX.referencing_maintenance_task (Figure 2) is used to reference the standard maintenance task that has been carried out under the authority of the work order. If no standard maintenance task is used then use Template: #9a representing_typical_activity.

Template #9 (Figure 2): referencing_maintenance_task Show template parametersHide all template parametersShow all template parameters
Description

Template #9 (Figure 2): referencing_maintenance_task Hide template parametersHide all template parametersShow all template parameters
Description
Parameter name:	Parameter value:	Parameter description:
task_id		The identifer of the task
task_version_id		The version of the task. If the task is not versioned use '/NULL'

NOTE    MoDAvDEX.referencing_maintenance_task is not instantiated by this template.

Template: #9a representing_typical_activity

The expectation is that Engineering and Asset management systems maintain a defined set of standard maintenance tasks. Work is then done in accordance with these tasks. The tasks are represented by the template #2 MoDAvDEX.referencing_maintenance_task. In the event that there is no predefined task for defining the work to be done, the template: #3 representing_typical_activity (Figure 2) is used to represent the standard description of an activity that has been performed under the authority of the work order.

Template #9a (Figure 2): representing_typical_activity Show template parametersHide all template parametersShow all template parameters
Description

Template #9a (Figure 2): representing_typical_activity Hide template parametersHide all template parametersShow all template parameters
Description
Parameter name:	Parameter value:	Parameter description:
id	@wo_id	The identifier of the work order is used to identify the typical activity.
id_class_name	Activity_method_identification_code	The name of the class being used to classify the identification (Identification_assignment) of the typical activity. This provides the role or reason for the identification.
id_ecl_id	"urn:plcs:rdl:std"	The identifier of the External_class_library storing the definition of the class referenced by the parameter @id_class_name class.
id_owner	LITS	The name or identifier of the organization owning the identifier of the typical activity.
id_owner_class_name	Organization_name	The name of the class being used to classify the identification of the organization. For example CAGE code, or organization name.
id_owner_ecl_id	"urn:plcs:rdl:std"	The identifier of the External_class_library storing the @id_owner_class_name class
type	Typical_activity	The name of the class being used to classify the typical activity.
type_ecl_id	"urn:plcs:rdl:std"	The identifier of the External_class_library storing the definition of the class referenced by the parameter @type class.

NOTE    representing_typical_activity is not instantiated by this template.

Template: #7 assigning_reference_data

The template: #7 assigning_reference_data (Figure 2) is used to represent the type of activity done.

Template: #9 assigning_organization

The template: #9 assigning_organization (Figure 2) is used to represent the organization that undertook the work.

Template: # assigning_time

The template: # assigning_time (Figure 2) is used to represent the time the activity was reported. This may be the same time as when the activity was completed.

Template: # assigning_approval

The template: # assigning_approval (Figure 2) is used to