I wonder if there is a way to moddify current XML schema to have some commands which do exist but they aren't supported in the current file. Basicaly, BuildingsInfo has command SpecialistYieldChanges, which I want to use for techs and civics as well, however they don't have it. End result would be that once you discover Scientific Method all scientists produce +1 research. Corporation makes merchants produce +1 gold, Mass Media artists +1 culture, Assembly Line and Industrialization engineers +1 production. And for priests, in Pacifism they would produce additional culture, in Theocracy gold, in Organized Religion research and industry.... You get the picture. Is that possible by modding only XML, what do I have to change?