Within SharePoint Portal Server, a document library exists that enables the key components of document management functionality. Examples of this functionality include check in and check out, document version control, history tracking, document profiling with the use of metadata, and granular document security access control. Some of these features were discussed at a high level in Chapter 2. For example, check in and check Out, can be enabled or disabled on individual folders. Coordinators will need to determine the folders that require an Author or Editor to have exclusive access over the document by checking the document out. When a document is checked out, other users cannot modify the document.