“…Standardization of interfaces, both in terms of code APIs and data-interchange formats, are key to ensuring that effort is not unnecessarily duplicated between the limited resources of each generator development team. Examples, largely but not universally supported, include the LHE and HEPMC event formats and their supporting libraries [372][373][374], specialist "afterburner" event generators like EVTGEN [340], the LHAPDF interface and archive of parton-density functions [375], and TMDlib [376].…”