1. A computer-implemented method for managing different representations of information, comprising: receiving information describing a first representation of data variable information in a first data structure in a first data processing system; receiving information describing a second representation of the data variable information in the first data structure in a second data processing system; and mapping the first representation of the data variable information to the second representation of the data variable information, the mapping comprising: identifying a correspondence between the first representation and the second representation using a set of data processing activities performed in accordance with a first set of machine-readable instructions, representing the correspondence using the set of data processing activities performed in accordance with the first set of machine-readable instructions, and making the correspondence between the first representation and the second representation available for changing the first representation of the data variable information to the second representation of the data variable information.