The desktop user interface follows the Motif guidelines. Motif, however, does not define a desktop, only the basic behaviors for applications and widgets. The Style Guide and Certification Checklist defines the guidelines that enable an application to integrate well with the desktop. Thus, to write a desktop-conforming application, you should follow both the CDE 2.1/Motif 2.1 Style Guide and Glossary and the Common Desktop Environment: Style Guide and Certification Checklist.
Compliance with the desktop interface guidelines is voluntary and self-regulated. There is no formal certification process. Applications that meet all the required guidelines in this style guide and the CDE 2.1/Motif 2.1 Style Guide and Glossary can be considered desktop compliant.
CDE 2.1/Motif 2.1 Style Guide and Glossary is part of a set of style guides for Motif that are available from The Open Group (www.opengroup.com). This book set replaces the OSF/Motif Style Guide, although there are few differences in the actual guidelines.
In this book, priorities have been assigned to each guideline: Required, recommended, and optional.