Finally, the relationships some concepts have with others, as defined in a concept system, add semantics to data. For instance, the concept of a temperature measurement is different if it is a measure of the kinetic activity of molecules of air in some location on Earth versus a measure of ambient infra-red radiation in inter planetary space between Jupiter and Saturn. In both cases, instances of temperature are ultimately measures of infra-red radiation, but they are obtained far differently. The temperature of air is directly determined by the motion of molecules. There are far too few molecules in inter-planetary space for the same kind of measurement to be meaningful. A different sort of measurement is required.