A first version of a document is accessed so that a corresponding contract dictionary is generated with a plurality of string tokens. Subsequently, a visual distinction is assigned to the corresponding ranking priority of each of the plurality of string tokens. A second version of the document is accessed and changed string tokens are identified by comparing the second version with the first version of the document. A corresponding ranking priority is then retrieved for each of the changed string tokens in the contract dictionary so that each of the changed string tokens can be highlighted with the visual distinction corresponding to the ranking priority. Each of the highlighted changed string tokens can then be displayed with the visual distinction and the document on a graphical user interface.