3. The data processing system as claimed in claim 1 , wherein the first format further displays for each modified document surrogate in the subset of the result list a summary of the modified document surrogate.
3. The data processing system as claimed in claim 1 , wherein the first format further displays for each modified document surrogate in the subset of the result list a summary of the modified document surrogate. 4. The data processing system as claimed in claim 3 , wherein the summary is displayed when a user moves a cursor over the displayed modified document surrogate.