Purpose and Scope
Some feature properties may have their own cyclic variation in time according to an established schedule. For example, a navaid can be operational during day time and unserviceable during night time, etc. To model such situations, the concept of “properties with schedule” has been introduced since AIXM version 5.1. It associates the properties that have cyclic varying values with "timesheets” that describes the times when each value is applicable for those attributes. At the feature level, all the properties that change according to the same schedule are located in a separate class, which inherits from an abstract class called
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"PropertiesWithSchedule". For example, the working hours of a navaid are modelled through the NavaidOperationalStatus class, which associates a status attribute with the Timesheet inherited from the PropertiesWithSchedule class, as visible on the diagram below.
The details of the schedule model and coding guidelines for general and particular cases are provided here:
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