SharePoint collaboration and document management features are the core of the system. It provides users with an environment that includes many features for collaborative document creation including full document lifecycle. Users with coordinator or author roles can check out documents, edit the documents, and then check the documents back in. Users can route documents for approval using workflow processes and make the approved documents available for viewing by a wider audience of readers. In addition, users can subscribe to documents and directories and receive notifications of changes in those documents and directories.