WITSML realtime group definition component object. The id of this group. The value should match a commonly agreed value. True (value of "1" or "true") indicates that this group will be represented by multiplexed data records. False (value of "0" or "false") indicates that this group will be represented by de-multiplexed data channels. The depth or time interval over which the group data are requested to be derived. A pointer to the log (within the context of the current wellbore) that will be used to persist this data. A pointer to the wellLog (within the context of the current wellbore) that will be used to persist this data. A comment or remark about this group. The definition of a channel.