In the Resource Categories view you can examine the categories stored in the runtime repository. These categories are assigned to resources in Composition Center, and used in Ad Hoc Correspondence as filter parameters when searching for resources to add to a document.
You can list all categories stored in the repository, and if you select a category you will see all resources it is assigned to. You can also export categories to a ZIP file. This ZIP file is used when migrating categories from one runtime repository to another.