A new AIXM version might introduce new data items, additional properties to existing data items, different coding capabilities (such as a new type of Timeslice), etc. Therefore, mixing data from different AIXM versions might lead to incompatibilities and errors.

In order to avoid such incompatibilities and to reduce the integration effort for data users, a unique AIXM version is specified for the Digital AIS Data Sets.

Rule

A Digital Data Set shall be valid against the AIXM 5.1.1 BasicMessage XMLSchema (http://www.aixm.aero/schema/5.1.1/message/AIXM_BasicMessage.xsd).

It shall be kept in mind that AIXM 5.1 is fully forward and backwards mappable with AIXM 5.1.1. In fact, when considering the scope of the ICAO Digital AIS Data Sets, there is practically no significant difference between the two versions.

Concerning AIXM 4.5

States that do not have the technical capability to provide AIXM 5.1(.1) data set and that have an older system able to provide AIXM 4.5 data sets, should still consider making available such data sets as a first step towards the provision of a fully compliant AIS Data Set. For this purpose, the AIXM 4.5 to AIXM 5.1 Mapping Rulesshould be used in order to identify the data necessary to be included in the AIXM 4.5 files so that it approaches to the maximum possible extent the requirements for the AIS Data Set.

References

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