Provided are a composition for forming porous film which can form a porous film having practical mechanical strength in a simple and low cost process; a porous film and a method for forming the film; and an inexpensive, high-performing and highly reliable semiconductor device comprising the porous film inside. Indications that the vehicle is parked may include when an automatic transmission is in park, a park brake is set, an autopark event concludes, or during a remote start event. An opposite one of the inner piece and the outer piece has a complementary female engagement device therein. The IMS gateway system then maps fields of the first message in the first protocol to fields in the second message in a second protocol used by the OCS, and transmits the second message to the OCS through a second interface.