Data is information that is interpreted by a collection
(Representation) of explanatory words or symbols. A simple
explanation is a 60mph sign at the side of the road. The figure 60
is the data while the sign embossed with 60 is the representation
informing you of that which you need to know. Traffic lights are a
representation that tells you by the data of different colours what
you you need to know. @ is a representation of the data "at"