The AIP Data Sets will include a limited set of data elements that are likely to be common to all ICAO Member States, such as tables of cruising levels, GNSS and other special navigation systems, organisations of type “State”, etc. In order to avoid widespread duplication of such data, a common data subset is provided through the AIXM web site. This covers this common reference data and it is maintained by the AIXM CCB.

When there is a change in the data contained in the common ICAO AIP subset, a new version of the subset will be provided including a new TimeSlice for the feature concerned, valid from the start of applicability of that change.

Rule

An AIP Data Set shall not re-define locally the data features declared in the Common ICAO AIP Data Subset, available at:

http://www.aixm.aero/dataset/5.1.1/aixm_5_1_1_icao_common_data_subset.xml

Open issue

What should be the validTime.BeginPosition and the featureLifetime.BeginPosition for the features included in the common ICAO AIP data set?

One proposal is to omit the featureLifetime for all the features included in the data set.

validTime.BeginPosition could be Nov 2018, as no AIP Data Sets would not be published before. Alternatively, the individual features could have a start of validity long time in the past as the data subset itself would be valid from the date of publication. That would ensure that references from legacy data are also covered in the past.

Rule

An AIP Data Set shall use abstract references (as defined in section 3.4 of the AIXM Feature Identification and Reference) in order to encode associations with features contained in the Common ICAO AIP Data Subset.

Permission

An AIP Data Set may include the Common ICAO AIP Data Subset using the following XML include statement:

<xi:include href="http://www.aixm.aero/dataset/5.1.1/aixm_5_1_1_icao_common_data_subset.xml" parse="xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>

Permission

An AIP Data Set may include features from the Common ICAO AIP Data Subset on condition that they are copied identical and not modified.

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