Comment describing your root element Unique message number The business step of which this event was a part. In Indisputable Key, this can be for example the log sorting from Malå The business location where the objects associated with the EPCs may be found, until contradicted by a subsequent event. The business condition of the objects associated with the Object Code(s), presumed to hold until contradicted by a subsequent event. Unlikely to be used in the Indisputable Key