Systems and methods for managing data, such as metadata, are disclosed. In one exemplary method, metadata representing a document lineage are stored, and the stored metadata are searched. The metadata representing a document lineage may comprise a document identifier, identifying a collection of related...http://www.google.com.tw/patents/US20080040388?utm_source=gb-gplus-share專利 US20080040388 - Methods and systems for tracking document lineage
