message_ix_models.model.material.build.make_spec

message_ix_models.model.material.build.make_spec(regions: str, materials: str = ('generic', 'common', 'steel', 'cement', 'aluminum', 'petro_chemicals', 'buildings', 'power_sector', 'fertilizer', 'methanol')) → Spec

Return the structural Spec for MESSAGEix-Materials.