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Understanding the AIXM Temporality Model: Incorporating Time in Feature Attributes

The AIXM Temporality Model introduces the concept of time at the feature level, asserting that all features have a defined lifespan, including a start and end of life. For example, an air traffic control sector or a VOR frequency change demonstrates how features can evolve over time. This model relates feature properties to the duration they are valid and provides methods to describe these time extents. With concepts like Time Slice models and temporary changes (e.g., digital NOTAMs), the model captures the dynamic nature of aviation features. For more information, visit www.aixm.aero.

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Understanding the AIXM Temporality Model: Incorporating Time in Feature Attributes

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  1. Temporality Model • Definition • A model that incorporates the concept of time at feature level! • Key assertions • All features are temporal with start of life and end of life • Example, A new air traffic control sector • All features can change over time • Example, A VOR changes frequency • AIXM Temporality Model • Relates feature properties to the time extent in which they are valid • Provides various means to describe the time extent

  2. Features have time varying properties

  3. The basic Time Slice model

  4. The basic Time Slice model

  5. PERMDELTA TimeSlices

  6. Temporary events (digital NOTAM)

  7. Current status of a feature

  8. Temporality – something different

  9. AIXM Temporality document See www.aixm.aero

  10. Example – abstract Start of life

  11. Example - abstract Permanent Changes Attention: “DELTA” for complex properties (objects) – see section 3.4 “DELTA” for multi-occurring properties – see section 3.5

  12. Example - abstract Temporary change (NOTAM)

  13. Example - abstract End of life

  14. Properties with schedule

  15. An Example: Navaid frequency change AML Navaid undergoes an upgrade that changes its frequency from 112.0 MHz to 113.2 MHz…

  16. Questions?

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