Patent ID: 6349311
Filing Date: 2002-02-19
Classification: G06F,Y10S

Abstract:
A method for updating a computer readable file from an original state to a final state, the original state residing on a computer system, the original state and the final state being states within an ordered sequence of states, the final state being later in the sequence than the original state, and the sequence including a final hub state which is not preceded in the sequence by the final state, the method comprising:using an original back-update and the original state to produce an original hub state; responsive to the original hub state not being the final hub state; wherein at least one intermediate state is between the original hub state and the final hub state: using a hub incremental update and the original hub state to produce a final hub state without using any intermediate states; and responsive to the final hub state not being the final state: using a final incremental update and the computer readable file of the final hub state to produce a final state; retaining the final state; producing a final back-update for producing the final hub state from the final state; and retaining the final back-update.