Example
<channelCode>BHZ</channelCode>
This consists of
<channelCode>
<bandCode>
<gainCode>
<orientationCode>
<sampling>
<channelEffectiveTimeOverlap>
<orientationRange>
<orientationAzimuthRange>
<orientationDipRange>
<channelAND>
<channelOR>
<channelNOT>
<passChannel>
<externalChannelSubsetter>
site
station
network
<hadDataLastWeek>
<printlineChannelProcess>
<responseWriter>
<stationHas>
<alwaysSuccess>
<hasResponse/>
<hasSensitivity/>
<repairSensitivity/>
end channelLogical choice
<bandCode>
<gainCode>
<orientationCode>
<sampling>
<channelEffectiveTimeOverlap>
<orientationRange>
<orientationAzimuthRange>
<orientationDipRange>
<channelAND>
<channelOR>
<channelNOT>
<passChannel>
<externalChannelSubsetter>
site
station
network
<hadDataLastWeek>
<printlineChannelProcess>
<responseWriter>
<stationHas>
<alwaysSuccess>
<hasResponse/>
<hasSensitivity/>
<repairSensitivity/>
Places this can be found
channelOR contains this directly
channelAND contains this directly
alwaysSuccess contains this directly