Patent ID: 8463539

Claim:
An information processing apparatus for a movable body comprising: an external information storage unit configured to acquire and store at least external information including validity time information for defining a valid period of the external information; a valid period acquisition unit configured to acquire a valid period of the external information acquired by the external information storage unit; an external information invalidation unit configured to invalidate the external information stored in the external information storage unit, when it is determined that the valid period of the external information has expired by examining the valid period of the external information; and a current time acquisition unit configured to acquire a current time, wherein when the valid period acquired by the valid period acquisition unit includes a standard time and a relative time relative to the standard time, the external information invalidation unit determines whether the valid period of the external information has expired based on the relative time and the standard time, when the valid period includes the relative time and does not include the standard time, the external information invalidation unit determines whether the valid period of the external information has expired based on the relative time and the current time acquired by the current acquisition unit, and when the valid period of the external information is determined as expired, the external information invalidation unit invalidates the external information by avoiding use of the external information stored in the external information storage unit and by moving the external information to a non-use area that stores the external information as non-use information.