Documents not stored on a computer are called document originals. Use the Document Revision/Originals tab when you have a document that is not stored electronically. This holds information about storage locations, storage media, format, and other related information. What kind of medium is the original? Is the document originally generated by an application and where is this application located? These are some of the questions that the information on the tab can answer.
From Document Revision/Originals tab you can access the Document Sheets page in which you can register more information about the sheets.