Granularity level (from RoMM), i.e., electronic, atomistic, mesoscopic, or continuum level according to RoMM See https://github.com/HE-BatCAT/lbco/blob/main/external/osmo.ttl#granularity_level
Physical equation type, i.e., a symbol referring to the physical equation underlying a model, mostly following RoMM (n.b., these entities are not models, they are descriptors of models). See https://github.com/HE-BatCAT/lbco/blob/main/external/osmo.ttl#physical_equation_type