Methods and systems for data maintenance in an offline-distributed database
network system, which comprises a central system having a central database, and
node systems having local databases capable of containing different subsets of
data from the central database. First, change information relating to data stored
in at least one of the central and local databases is recorded in at least one
of the node systems. Then, a replication object including the change information
is transmitted, if an online connection is available, from the recording node systems
to the central system or from the central system to the recording node systems.
The recipients of the replication object are determined based on at least one lookup
table in the central system. The lookup table is updated in accordance with the
change information of the replication object.
