Excerpts are abstracts of information found in a resource, such as a book. If you want to go into more detail for a given resource, there may be multiple excerpts as subpages of the resource document.

Sections of a document are typically part of a document. But the size of sections may vary. To support a team to write collaboratively on the documentation, a larger document may be subdivided into external section documents.

Describes a single step of an activity. A step is a generic document that is associated with a document that describes a process. It may be a test log or a howto.