ICAO ATS and OLDI Message Parser that parses all defined ATS and OLDI messages defined in ICAO DOC 4444 and the OLDI 4.2 specification respectively. The ICAO Parser will parse all the message titles defined in the ICAO DOC 4444, including FPL, CHG, DEP, ARR, CNL etc. All software has been written by Peter Venton, (pventon).