Method and an arrangement for concurrency control of temporal data

[0040]FIG. 1 depicts an exemplary arrangement according to an embodiment of the present invention. The arrangement 100 has a first terminal 110 and a second terminal 120 communicatively connected to a data communication network 140, e.g. Internet. The arrangement preferably also has a server computer 130 to which the terminals 110, 120 are communicatively connected via the communication network 140. Each terminal runs a software program suitable for producing an animated scene in collaboration with at least one other terminal. The user of a terminal 110 animates or controls at least one object 101 of the animated scene. The user of a terminal 110 also sees animated objects controlled by other users. For example, the user of the terminal 120 controls an object122 of which a copy is shown as an object 102 on terminal 110. Similarly, the user of the terminal 120 may see a copy of object 101, controlled by the user of the terminal 110, as an object 121 depicted on the terminal 120. The cir