Abstract: A facility is provided for maintaining automatically the integrity of data associated with respective data applications. The facility achieves this result by providing a plurality of data modules for interfacing respective ones of the applications with their associated data bases such that, in response to receipt of a data request from one of the applications, the respective interfacing module unloads the requested data from the associated data base. The interfacing module then communicates with other ones of the modules to determine if the requested data is consistent with related data stored in their associated data bases. If the requested data is found to be so consistent, then the data is supplied to the requesting application. If not, then the interfacing module corrects the inconsistency in accord with predefined data rules, and then supplies the corrected data to the requesting data application.