There is increasing recognition of the importance of data especially as its production and volume grows at ever increasing rates. It has been observed that the volume of data now present when compared to just two years ago is many-fold larger. This leads to the difficult question of what are valuable data and what are not. Indeed, much of the data being generated is from automated systems such as consumer internet-of-things (IoT) devices, weather detection instruments, and so forth. In many case...