[webservices] Response stage 0 vs Gain in stationXML

[Philip Crotwell]

Hi

The schema says that the <Gain> element within a channel <Epoch>
"Corresponds to SEED blockette 58 for stage 0." but the xml from the
web service does not include a <Gain> element and instead includes a
<Response stage="0"> that only contains a <StageSensitivity>. Seems
like using stage=0 is a SEED convention that really shouldn't be used
in stationXML???

This section of StationXML also seems pretty confusing as there are 4
different places you could put the overall gain,
<InstrumentSensitivity>, <Gain>, <Sensitivity> and <Response
stage="0"> all within a single channel <Epoch> element. Do you know
what the difference is between these?

thanks,
Philip