Abstract: A document creating device (10): creates a common document (100) serving as a template for creating a derived document (300), and a difference document (200) including a region (106) in which an element (206) different from elements (112, 114, 116, 114) in the common document is embedded, and an empty region (108); and generates the derived document (300) from the common document by replacing the elements in the common document with elements in the corresponding region of the difference document.

Abstract: This document creation device (10) divides common sections of documents of a plurality of diverse specifications into unit documents (100), manages and shares the unit documents, groups similar unit documents (100) and manages and stores the similar unit documents, couples unit documents to a set serving as one edited document on the basis of an edited document configuration (50), which is a list of unit documents coupling to the edited document, or couples the unit documents to an electronic file of one edited document, wherein, during said coupling, rewriting is performed such that, when referring to a group in which the content embedded in the unit documents is a set of unit documents, a document which belongs to the referenced group and which is included in the edited document configuration is referred to.