The document library is referred to in Open Atrium as the Notebook. Its functionality is similar to the functionality of a Wiki. In Drupal, this functionality is provided by the "book" core module. This module allows us to structure content in a similar manner that we would structure a book. Notebooks can have volumes, chapters, pages, and subpages that maintain a hierarchy with one another, so that the content can be organized in a consistent manner.
In this chapter, we will cover the main features of the Notebook: