1. A method for accessing object data stored in a computer system for independently processing said object data, comprising: storing a plurality of context IDs, wherein the context IDs are managed that each of a plurality of users of the system respectively uses one of the context IDs, wherein each of the object data is capable of having an entity corresponding to each of the context IDs; receiving a request for access to one object data from at least one of the plurality of users; specifying object data corresponding to the received request; successively identifying the context ID which is used by the user requesting the access; acquiring an entity in a set of entities of the object data, wherein the acquired entity corresponding to the identified context ID; providing contents of the acquired entity to the user requesting the access.