Patent ID: 7677436

Claim:
A presence system that manages presences of a user identified by a user identifier that specifies the user, the presence system comprising: a reception unit for receiving a renewal request that includes: a user identifier of a renewer, who is a user other than the owner of the presences; a user identifier of an object to be renewed, the object possessing a presence that the renewer attempts to set, and a presence that the renewer attempts to set; a category acquisition unit for acquiring category information associated with the renewer, wherein the category information represents the category of the content of the presence; an association table that stores an association of the identifiers of the presences of the object to be renewed, and the category information; a presence specification unit for referring to the association table, and for specifying the presence identifier associated with the category information corresponding to the renewer, and a presence setting unit for setting the presence included in the renewal request, with respect to the specified presence identifier.