Applications that run on Open Desktop Release 1.1, 2.0, and 3.0 will run on SCO OpenServer systems; however, the reverse may not be true.
Applications that run on Open Desktop Release 1.1 will run on Open Desktop Release 2.0 and 3.0; however, the reverse may not be true because Release 2.0 and 3.0 add features and technology not available in Release 1.1. Specifically, the APIs discussed in this chapter are new, and so not supported in releases prior to 2.0.
Release 1.1 defined icons through rules. These rules were located with other rules in rule files. When an application was installed, rule files had to be edited so the new rules could be added. The rule files had to be edited again when an application was removed or updated.
Release 2.0 and 3.0 uses a more modular approach: discrete icon objects are installed with a utility, eliminating the need to edit rule files. While icon objects simplify installation of applications onto this and future SCO OpenServer releases, icons defined this way will not display on Release 1.1 Desktops.
For more about installing Release 1.1-compatible applications on a Release 2.0 or 3.0 Desktop, see the Installation and Upgrade Guide for those releases. The Graphical Environment Guide provides instructions for transferring currently installed and configured applications from Release 1.1 to Release 2.0 or 3.0 Desktops.
Refer to the Getting Started Guide for information about Motif 1.2 and Motif 1.1 binary, visual, and behavioral backward compatibility.