Abstract: The present invention is a method and apparatus for aligning information input by multiple users into a common reference frame. In the invention, a computer accepts an input causing an event in a reference frame. The computer generates a specific state and at least one abstract condition describing the event. The specific state and abstract condition describing the event is transmitted to a receiving computer. A receiving computer has a corresponding reference frame and determines whether moving to the specific state is consistent with the abstract condition transmitted when applied to the receiving computers corresponding reference frame. If moving to the specific state is not consistent with the abstract conditions, the receiving computer generates an alternative state which satisfies as many high priority abstract conditions as possible.