During the past five years, Xerox has implemented a number of APL applications which interface with an internally developed relational data store. The syntax and features of the Xerox Planning Data Management System (XPDMS) are outlined, and several commonly used application utilities, which extend the power of XPDMS in areas such as array structuring and report generation, are examined. We conclude With a discussion of the effects of the implemented relational disciplines upon the functional management process.