1. A computer implemented method for retrieving a mapping rule based on a first parameter, wherein the mapping rule enables mapping a first message in a first message format to a second message in a second message format, the second message format being different from the first message format, the method comprising: identifying an identity of the first parameter associated with the first message; identifying a first variation associated with the identity of the first parameter; and identifying the mapping rule for the first variation, wherein the mapping rule provides a second variation associated with the first variation.