The i5/OS™ traditional system interface is the full set of system commands and other non-SQL facilities that let users access and modify DB2 Universal Database™ for iSeries™ data.
The traditional system interface provides a control language (CL) that can be used to create database objects. The system interface also has an integrated facility for describing data called data description specifications (DDS).
WebSphere® Development Studio for iSeries, an IBM® licensed program, provides several utilities to describe and process data. The data file utility (DFU) can add, change, and delete data in a database file described by RPG/400®, DDS, and Interactive data description utility (IDDU). The source entry utility (SEU) can be used to specify and change data in files.