IWXXM
IWXXM (ICAO Meteorological Information Exchange Model) is a format for reporting weather information in XML. IWXXM includes XML-based representations for products standardized in International Civil Aviation Organization (ICAO) Annex III and World Meteorological Organization (WMO) No. 49, Vol II, such as METAR, SPECI, TAF, and SIGMET. IWXXM products are used for operational exchanges of meteorological information for use in aviation.
Unlike the traditional forms of the ICAO Annex III / WMO No. 49 products, IWXXM is not intended to be directly used by pilots. IWXXM is designed to be consumed by software acting on behalf of pilots, such as display software.
History
IWXXM 1.0[1] was introduced in October 2013, representing METAR, SPECI, TAF and SIGMET formats as specified in International Civil Aviation Organization (ICAO) Annex III, Amendment 76. IWXXM became an optional format for the bilateral exchange of weather reports in November 2013.
Regulation
IWXXM is regulated by the World Meteorological Organization in concert with the International Civil Aviation Organization. IWXXM is defined at the technical regulation level in WMO Technical Regulation No. 49, Vol II, which is copied over to the WMO Manual No. 306 and to ICAO Annex III.