NMWG meeting 2003-12-03 ... Tanya wants to be able to get lots of different metrics at the same time. This is a request/reponse. Requesting measurements as, say, I want a measurement in the past, but I will accept any time for the last 24 hours. So we could have a time, and negativeTolerance and a positiveTolerance. To get rid of the cases of endTime