Methods and apparatus, including computer program products, implementing a technique for repairing links in a file. The file can contain one or more links, each link referring to a target file. For one or more of the links, a file identifier such as a file name, file number, or file address is stored....http://www.google.com/patents/US7072893?utm_source=gb-gplus-sharePatent US7072893 - Repairing links in locked files
