[1] Originally developed by AECMA (French acronym for the Association Européenne des Constructeurs de Matériel Aeronautique, later ASD), the S-Series suite of ILS specifications is managed currently jointly by multinational teams from the AeroSpace and Defence Industries Association of Europe (ASD) and Aerospace Industries Association (AIA)[2] reporting to the AIA/ASD ILS Council.
The initial "S" stands for specification, and the last letter indicates a keyword within the title, as highlighted in the list above.
This integration has ensured that the specifications have been included in the ASD Strategic Standardization Group (SSG) Radar Chart[4] as adopted.
A common unified S-Series ILS Specifications commenting tool was also established.
The representatives of the S-Series in the AP239 Edition 3 project are members of the Data Modeling and Exchange Working Group (DMEWG), which is responsible for the development of SX001G, SX002D, SX003X, SX004G and SX005G.