1. A computer-implemented method, comprising: identifying a first data set and a second data set, establishing a plurality of relationships, each of the plurality of relationships linking an element of the first data set to an element of the second data set, assigning a link weight to each of the plurality of relationships, said link weight being modifiable by interaction between the elements linked by the each relationship, computing a similarity quotient for the each relationship of the plurality of relationships, the similarity quotient being a measure of similarity between the elements linked by the each relationship, and classifying the plurality of relationships based on values of the similarity quotients.