Once the XML files have been compiled, they can be read and loaded by FSX. bgl files is compiled XML, which is usually compiled by programs such as BglComp and Shp2Vec – both come as part of the FSX SDK. Updated visual elements such as ground terrain, textures, taxiways and buildings around the airport/airfield.New AI traffic information based on real-world traffic.Updated or new ILS and radio communication information.The files mainly consist of modified, updated or corrected “.bgl” files which bring the airport data up to date – changes or updates could include The files in this category are for the many thousands of airports and airfields found within FSX. JFK airport updated and fixed with one of the AFCAD files for FSX.