Figure 1 shows the templates required to represent the deferral of a maintenance activity to a set of life properties. The templates shown in yellow in Figure 1 are standard OASIS template. Those shown in light green are business templates developed specifically for the MoDAvDEX context.

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

The following mandatory templates are shown in Figure 1 and used to represent different aspects of the scheduled maintenance activity.

Template: #1 MoDAvDEX.work_order

The template: #1 MoDAvDEX.work_order (Figure 1) is used to represent the maintenance work order and planned activity that has been deferred.

Template: #2 MoDAvDEX.referencing_maintenance_task

The template: #2 MoDAvDEX.referencing_maintenance_task (Figure 1) is used to identify the standard maintenance task that has been deferred.

Template: #3 MoDAvDEX.reportable_item

The template: #3 MoDAvDEX.reportable_item (Figure 1) is used to identify the reportable_item for which the activity has been deferred.

Template: #4 assigning_condition

The template: #4 assigning_condition (Figure 1) is used to represents the trigger or condition for undertaking the deferred activity. The activity is triggered when then date / time specified by template # 5 representing_date_time is reached.

Template: #6 assigning_asserted_state

The template: #6 assigning_asserted_state (Figure 1) is used to represent the deferred state of the Directed_activity instantiated by the MoDAvDEX.work_order.