Q-Data: Using Deductive Database Technology to Improve Data Quality

This chapter discusses an extended deductive database prototype system Q Data developed by Bellcore to improve data quality through data validation and cleanup The key technology component of Q Data is the extended deductive database sys tem LDL developed at MCC We discuss the issues of data quality improvement the relevance of the deductive database technology such as the LDL system to data quality improvement tasks and the system architecture of the prototype Fur thermore we describe our experiences using the deductive database technology in an on going Q Data trial attacking a real world problem with test data from oper ational systems Experiences related to engineering aspects of both the deductive database system and other component technologies as well as pragmatic aspects of the implementation of Q Data as a distributed system are discussed