eccodes/definitions/grib2/fireTemplate.def

meta originatingClass evaluate(inputProcessIdentifier/1000);

concept originOfPostProcessing(unknown) {
 'ecmf_od' = { originatingClass =  1; inputOriginatingCentre = 98; }
 'ecmf_ea' = { originatingClass = 23; inputOriginatingCentre = 98; }
}

alias mars.origin = originOfPostProcessing;
alias mars.model = postProcessing ;