An update of the AIXM Temporality Concept (version 1.1) is now available, as part of the AIXM 5.1.1 documentation. There are no conceptual changes in this version. The document has been re-organised in order to facilitate its reading by aeronautical information domain experts. The most important change is a new section dedicated to temporality consistency rules. The Examples have been removed from this document and are being incorporated in a reference implementation / test suite for the AIXM Temporality use cases.