| http://www.w3.org/ns/prov#value | - ______________________________________rate(X,time-- interval,min-- points) is (X[t] -X[t-time-- interval])/time-- interval.change(X,time-- interval,min-- points) is (X[t] - X[t-time-- interval])ave(X,time-- interval,min-- points) is the sum of X[t[j]] for j over N points in the previous time-- interval, divided by the number of sample points.dt(X) where X is a sensor or a variable returnsthe
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