15. The system of claim 14 , wherein the search engine is further configured to receive the query and to detect other interactions of users when implementing search events.
15. The system of claim 14 , wherein the search engine is further configured to receive the query and to detect other interactions of users when implementing search events. 16. The system of claim 15 , further comprising an index engine to mine applications, and to construct and maintain the mapping between the mined applications and the predefined characteristics.