The European Organisation for the Safety of Air Navigation AIXM Support for Digital NOTAM AIXM XML Developers’ Seminar #5 23 March 2010

AIXM Support for Digital NOTAM 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 - UML Draft used in xNOTAM Trial

AIXM Support for Digital NOTAM 4 Event Message Type – XML Draft 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 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. Current State

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

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 MHz to 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 Feature - gml:identifier Optional: include the BASELINE/SNAPSHOT in the message TEMPDELTA

AIXM Support for Digital NOTAM 23 Identifying the feature affected by “delta” 35149fb2-971f-492c-94c2-5671d …. BASELINE 23 …. …. TEMPDELTA 23 ….

AIXM Support for Digital NOTAM 24 Identifying the feature affected by “delta” 35149fb2-971f-492c-94c2-5671d …. SNAPSHOT …. …. TEMPDELTA 23 ….

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) Feature - gml:identifier BASELINE with End-of-life

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 35149fb2-971f-492c-94c d PERMDELTA 23 1 ….

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 baselineTSA 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 …. … … … Rule: Include all occurrences of the property in a TEMPDELTA or a PERMDELTA!

AIXM Support for Digital NOTAM 38 “Delta” for complex properties …. … … … …. … Rule: Include the whole complex property! (“delta” applies strictly to the 1 st level of properties!)