5. The method of claim 1 , wherein the historic usage data relating to the synonym rule comprises data that reflects whether, when a search engine revised a search query using the synonym rule, a user was satisfied with a search result associated with the revised search query.
5. The method of claim 1 , wherein the historic usage data relating to the synonym rule comprises data that reflects whether, when a search engine revised a search query using the synonym rule, a user was satisfied with a search result associated with the revised search query. 6. The method of claim 5 , wherein the data that reflects whether a user was satisfied with a search result associated with the revised search query comprises data that reflects whether a user selected or did not select a search result associated with the revised search query.