6. The method of claim 1 wherein the identifying the at least one compatibility keyword comprises identifying at least one keyword in the query as specification information describing a first specification.
7. The method of claim 6 , wherein the listing includes listing specification information and wherein the searching based on the item information and the at least one compatibility keyword to identify at least one listing on the network-based marketplace as matched comprises identifying the listing as matched based on a comparison of the specification information with the listing specification information.