7.17 COMBINING RULES FOR WAVEFORM OBX SEGMENTS
A waveform result "battery" may contain one or more channels of digital waveform data. The Observation Sub-ID is used to logically associate the TIM, CHN and WAV category OBX segments which pertain to a given set of channels in the result "battery." Each Sub-ID group must contain at least one TIM, one CHN and one WAV category segment and at least one of the TIM category result segments must precede the first WAV category result segment in that group.