Programming RPG IV with style
This chapter provides a style guide to coding RPG programs when using modern RPG, which includes fully free-form RPG.
Another source for style guidelines can be found in Appendix D of Programming in ILE RPG, 5th Edition:
When trying to develop guidelines and standards, one of the major challenges is determining what is a standard and what is a guideline. For example, code indentation is a standard, but whether the code is indented by two, three, or four characters ...