Abstract: Presented is a method and an apparatus that change references between computer-objects that are memory blocks. Purpose is to change all references to a specific computer-object, which is called current-destination-object, into another object, which is called next-destination-object. For this purpose, information showing the next-destination-object, which is called as order-information, is attached to the current-destination-object. Reference of each computer-object is changed by tracing these computer-objects, references and order-information in order of the followings: A source-object, reference held by the source-object, next-destination-object indicated by the reference, and order-information (showing the next-destination-object) that is attached to the current-destination-object. Finally, the reference is changed so as to indicate the new destination object.

Abstract: Apparatus holds a replica of the original object that is editable by apparatuses equivalent to a computer. The apparatus creates a packet of editorial contents to the replica, send the packet to a server or other apparatuses, and receives a packet of editorial contents to another replica held by another apparatus. The apparatus judges an order of packets by information from a server, and updates the replica by each packet. When apparatuses use same initial replicas, same sequence of packets and same updating procedure, replicas of them synchronize each other on common axis that is a sequence of packets.

Abstract: Introduced is information that indicates a changing of “a reference that points a referenced record” to “another reference that points another record”. This information is named as “changing reference information (CRI)” and is registered to a referred record. When accessing a referencing record, there is a possibility to access referenced record by necessity of a program or an operator. At this time, CRI registered to originally referenced record is accessed. And the reference is changes to new record as indicated by the CRI. Thus, status of a DB in a device is changed by the invention. When PCs have reproduced DBs that are copy of the original and edit their own reproduced DBs so as to change a reference, these editorial contents with CRI will be propagated to other PCs. Other PCs change references of their reproduced DBs according to the CRIs.