Because the stages.pdf file in the NetRexx distribution has lines running off the right side of the pages, here a version in html: Stages.html. This will be corrected in the NetRexx 4.04 release.

After the release of NetRexx 4.03 on May 2nd, 2022, work on the new 4.04 release is well underway. A major new development is the use of Rexx built-in-functions in scripts - these are the NetRexx methods of the Rexx class, but in non-oo-notation. — NetRexx (@NetRexx) May 24, 2022 As always, you can build NetRexx 4.04 from the repositories at github or sourceforge, and that only requires a working Java jre - or download the preview (at the bottom of this page).