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AIXM Support for Digital NOTAM

AIXM Support for Digital NOTAM. AIXM XML Developers’ Seminar #5 23 March 2010. Contents. Event Message Type Temporality The Temporality Model Applying the Temporality Model Usage Examples Properties with Schedule eASM examples. Event Message Type - UML Draft used in xNOTAM Trial.

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AIXM Support for Digital NOTAM

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  1. AIXM Support for Digital NOTAM AIXM XML Developers’ Seminar #5 23 March 2010

  2. Contents • Event Message Type • Temporality • The Temporality Model • Applying the Temporality Model • Usage Examples • Properties with Schedule • eASM examples AIXM Support for Digital NOTAM

  3. Event Message Type - UMLDraft used in xNOTAM Trial AIXM Support for Digital NOTAM

  4. Event Message Type – XMLDraft used in xNOTAM Trial AIXM Support for Digital NOTAM

  5. Event Message Type • Upgraded to AIXM 5.1 extension • Tested in OGC OWS-7 testbed AIXM Support for Digital NOTAM

  6. Contents • Event Message Type • Temporality • The Temporality Model • Applying the Temporality Model • Usage Examples • Properties with Schedule • eASM examples AIXM Support for Digital NOTAM

  7. Temporality Summary - Time Slice types • BASELINE = A kind of Time Slice that describes the feature state (the set of all feature’s properties) as result of a permanent change; • PERMDELTA = A kind of Time Slice that describes the difference in a feature state as result of a permanent change; • TEMPDELTA = A kind of Time Slice that describes the transitory changes of a feature state during a temporary event; • SNAPSHOT = A kind of Time Slice that describes the state of a feature at a time instant, as result of combining the actual BASELINE Time Slice valid at that time instant with all TEMPDELTA Time Slices applicable at that time instant. AIXM Support for Digital NOTAM

  8. Feature has time varying properties AIXM Support for Digital NOTAM

  9. The basic Time Slice model AIXM Support for Digital NOTAM

  10. The basic Time Slice model AIXM Support for Digital NOTAM

  11. Temporary events – digital NOTAM AIXM Support for Digital NOTAM

  12. Current State SNAPSHOT = describes the state of a feature at a time instant, as result of combining the actual BASELINE Time Slice valid at that time instant with all TEMPDELTA Time Slices applicable at that time instant. AIXM Support for Digital NOTAM

  13. Permanent changes PERMDELTA = A kind of Time Slice that describes the difference in a feature state as result of a permanent change. AIXM Support for Digital NOTAM

  14. Time Slice Types AIXM Support for Digital NOTAM

  15. Corrections • Information about events that are planned to take place in future • update the already communicated information • may affect “event” Time Slices - of type PERMDELTA and TEMPDELTA. • Solution • Identify Time Slice concerned by a “sequence number” • Also needed: “correctionNumber” AIXM Support for Digital NOTAM

  16. Final UML representation AIXM Support for Digital NOTAM

  17. AIXM UML – including temporality AIXM Support for Digital NOTAM

  18. Summary - Time Slice types • BASELINE = A kind of Time Slice that describes the feature state (the set of all feature’s properties) as result of a permanent change; • PERMDELTA = A kind of Time Slice that describes the difference in a feature state as result of a permanent change; • TEMPDELTA = A kind of Time Slice that describes the transitory changes of a feature state during a temporary event; • SNAPSHOT = A kind of Time Slice that describes the state of a feature at a time instant, as result of combining the actual BASELINE Time Slice valid at that time instant with all TEMPDELTA Time Slices applicable at that time instant. AIXM Support for Digital NOTAM

  19. An Example: Navaid frequency change Imagine that AML Navaid undergoes an upgrade that changes its frequency from 112.0 MHz to 113.2 MHz… AIXM Support for Digital NOTAM

  20. Applying the model for Digital NOTAM • TEMPDELTA • For temporary situations • PERMDELTA • For permanent changes • BASELINEs • For so called “transient” features AIXM Support for Digital NOTAM

  21. TEMPDELTA • Changes of a limited duration • Considered to be overlaid on the permanent state of the feature • When the temporary change ends, the temporary changes no longer apply and we revert back to the permanent feature state. AIXM Support for Digital NOTAM

  22. TEMPDELTA Feature - gml:identifier Optional: include the BASELINE/SNAPSHOT in the message AIXM Support for Digital NOTAM

  23. Identifying the feature affected by “delta” <Feature> <gml:identifier>35149fb2-971f-492c-94c2-5671d4580587</gml:identifier> <timeSlice> <validTime>….</validTime> <interpretation>BASELINE</interpretation> <sequenceNumber>23</sequenceNumber> <property1>….</property1> <property2>….</property2> …. </timeSlice> <timeSlice> <validTime>….</validTime> <interpretation>TEMPDELTA</interpretation> <sequenceNumber>23</sequenceNumber> <property4>….</property4> </timeSlice> </Feature> AIXM Support for Digital NOTAM

  24. Identifying the feature affected by “delta” <Feature> <gml:identifier>35149fb2-971f-492c-94c2-5671d4580587</gml:identifier> <timeSlice> <validTime>….</validTime> <interpretation>SNAPSHOT</interpretation> <property1>….</property1> <!-- Natural key --> <property2>….</property2> </timeSlice> <timeSlice> <validTime>….</validTime> <interpretation>TEMPDELTA</interpretation> <sequenceNumber>23</sequenceNumber> <property4>….</property4> </timeSlice> </Feature> AIXM Support for Digital NOTAM

  25. PERMDELTA • Considered irreversible at the time when it is being made • For Permanent Events, two Timeslices are created: • the first one is of type PERMDELTA and contains just the values of the modified properties; • the second one is of type BASELINE and contains the result of merging the changes (as they appear in the above PERMDELTA) with the existing BASELINE form the database. The result is this new BASELINE. It is a recomendation of the Temporality model to include in the AIXM 5 message both the PERMDELTA and the BASELINE AIXM Support for Digital NOTAM

  26. PERMDELTA Feature - gml:identifier AIXM Support for Digital NOTAM

  27. BASELINE with End-of-life • A temporary obstacle that did not exist before and does not have a baseline (static data) can also be created as a Temporary Event. • This creates a BASELINE which has an end-of-life AIXM Support for Digital NOTAM

  28. Feature creation (commissioning) Feature withdrawal (de-commissioning) BASELINE with End-of-life Feature - gml:identifier AIXM Support for Digital NOTAM

  29. Cancelling a Time Slice • Indicate a cancellation: • validTime is empty • Use same sequence number • Use a higher correction number <Feature> <gml:identifier>35149fb2-971f-492c-94c2-5671d4580587</gml:identifier> <timeSlice> <gml:validTime nilReason=“inapplicable” /> <interpretation>PERMDELTA</interpretation> <sequenceNumber>23</sequenceNumber> <correctionNumber>1</correctionNumber> …. </timeSlice> </Feature> AIXM Support for Digital NOTAM

  30. Contents • Event Message Type • Temporality • The Temporality Model • Applying the Temporality Model • Usage Examples • Properties with Schedule • eASM examples AIXM Support for Digital NOTAM

  31. Properties With Schedule (1) AIXM Support for Digital NOTAM

  32. Properties With Schedule (2) AIXM Support for Digital NOTAM

  33. Temporality Documentation AIXM Support for Digital NOTAM

  34. eASM extension AIXM Support for Digital NOTAM

  35. eASM examples – TSA airspace • AIXM 5.1 data set containing “baseline” information about a TSA airspace. TSA baseline • It includes • the airspace geometry definition • the declaration of the default state “available for activation”. This means that the airspace is normally inactive and information about its activation will be promulgated as a “delta” Timeslice. • Information about the activation of the airspace is provided in an “eAMI” message, that includes a TempDelta TimeSlice for the TSA airspace eAMI message – Airspace Activation AIXM Support for Digital NOTAM

  36. Appendix • Some tricky examples AIXM Support for Digital NOTAM

  37. “Delta” for multiple occurring properties <AirportHeliportTimeSlice> …. <serves> <City> <name>…</name> </City> </serves> <serves> <City> <name>…</name> </City> </serves> … Rule: Include all occurrences of the <serves> property in a TEMPDELTA or a PERMDELTA! AIXM Support for Digital NOTAM

  38. “Delta” for complex properties <AirportHeliportLimitation> …. <hasApplicableTimes> <Timetable> <workingHours>…</workingHours> <isComposedOf> <Timesheet>…</Timesheet> </isComposedOf> <isComposedOf> <Timesheet>…</Timesheet> </isComposedOf> …. </hasApplicableTimes> … Rule: Include the whole complex property! (“delta” applies strictly to the 1st level of properties!) AIXM Support for Digital NOTAM

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