The tasks involved in creating and maintaining a DID on the iSeries result in adding and changing data in the ITP/SDK for iSeries database and/or the creation of actual iSeries objects. Any actual iSeries objects involved are referred to in the ITP/SDK for iSeries database, but it is important to realize that any changes made to these objects outside the context of the ITP/SDK for iSeries may go unnoticed by the ITP/SDK for iSeries. The most important iSeries objects involved are the source libraries and object libraries associated with a DID-source, the data retrieval programs associated with an Entry and the programs execute function associated with User-defined functions.