Subfiles are an iSeries basic. They are used to display lists of information via a screen. Usually this is static data, ie; lists of accounts, payment history, invoice line items, etc. Subfiles involve the use of a HLL such as RPG, traditional files such as PF or LF, and display file DDS to define the data and its visual presentation. A basic subfile inquiry program will be reviewed along with its display file DDS. Using the Dori Allen Cookbook Guide to Subfile Coding, I will discuss and explain each piece. This presentation can also be presented with COBOL code for the COBOL audience.

By the end of this session, attendees will be able to:
1. Understand the basic 8 DDS subfile keywords.
2. Understand the difference between a subfile control format and a subfile data format.
3. Be able to write a simple subfile program.