Patent 7843590 was granted and assigned to Hitachi on November, 2010 by the United States Patent and Trademark Office.
Provided is an information management method for use in an information management system that includes a coordinate pointing device for identifying a paper medium, and a contents server for managing a digital document, and holds an attribute of the digital document and an attribute of a paper document obtained by printing the digital document on the paper medium, the information management method comprising: judging whether a paper document identified by the coordinate pointing device is a master of a document by referring to an attribute of the paper document; and permitting, when it is judged that the identified paper document is the master of the document, to update information annotated to the identified paper document in a digital document corresponding to the paper document to which the information has been annotated.