In a processing entity receiving one or more streams of data points from at least one data generating device; receiving, from a client device, a stream request indicating at least one of the data streams and including information indicating a stream modification; translating the information indicating a stream modification to selection criteria relative to the data points of the at least one data stream; modifying the at least one data stream by filtering the data stream based on the translated selection criteria; and providing the modified data stream to the client device.