§9.2 / §22 A named measurand definition (typically from a stdlib package).
from field: moddef.v1.Accumulation accumulation = 15;
from field: moddef.v1.Aggregation aggregation = 13;
from field: string base_quantity = 10;
from field: string canonical_unit = 20;
from field: string description = 3;
from field: moddef.v1.Direction direction = 11;
Optional
from field: moddef.v1.ValueType expected_value_type = 21;
from field: moddef.v1.MeasurementLocation location = 14;
from field: string measurand_id = 1;
from field: string name = 2;
from field: moddef.v1.PhaseRef phase_ref = 12;
from message moddef.v1.MeasurandDefinition
§9.2 / §22 A named measurand definition (typically from a stdlib package).