Content-based addressing is used to navigate forward, backward and in a circular fashion through documents in a content space. To enable backward navigation, a descriptor file is created for a new version that contains not only a message digest for the new version, but also a message digest of the older...http://www.google.fr/patents/US7895224?utm_source=gb-gplus-shareBrevet US7895224 - Navigation of the content space of a document set
