There are a couple of different types of group structures that we'll encounter here at OSU.

The first type is a standard, flat structure. This is where the groups are independent of each other. This is frequently found in the Topical mode, but it can also exist in the Organizational mode for smaller organizations.

The second type is a hierarchical structure, which tends to exist more frequently in the Organizational mode.

The following configuration elements that will be discussed in this chapter need to exist on any OSU Drupal OG site. We'll discuss expanding these settings to cover hierarchical needs in the Group Configurations - Nested chapter.