1. A system for incremental maintenance of replicated information between a base table and a target table that are restructured representations of each other, the system comprising: a monitoring module configured to receive notification of modifications to the base table; a consultation module configured to consult the base table about the nature of the modifications to the base table in response to receipt of notification by the monitoring module; and a conversion module configured to receive the nature of the modifications from the consultation module and propagate the modifications into the target table, including propagating changes to the metadata of the base table into the target table.