A 'Unit' in Rhapsody is a file on the File System in which model information is stored. Understanding the concept of units is important prior to configuring Rhapsody projects under source-code management tool control, or to share information across projects on the file system. By default units are created for each package. It's also possible to create units at a finer level of granularity, e.g., for elements based on components, classes, objects and diagrams. This can be done individually or by setting project properties. This video explores some of these concepts and provides an in depth overview of the Edit Unit dialog.
A follow-up video will cover sharing units between projects.