1. A system for managing data stewardship in a multi-level master data management system, comprising: steward data composer including at least: steward data creator operable to create a data steward repository for a master data management system to define relationships between data stewards and data objects for which data stewards are responsible; steward data consolidator operable to create an integrated data steward repository by combining multiple data steward repositories; and steward data conflict resolver operable to support functionality that overrides data steward relationships; and data stewardship facilitator including at least: data steward locator operable to determine from the data steward repository the data steward responsible for a data object; data update notification module operable to notify the determined data steward of a pending data update; and data update handler operable to support data steward to approve or reject the data update.