Patent ID: 8447885

Claim:
A user terminal system comprising: a metadata interpreter receiving first digital content transmitted from a server, separating first metadata from the first digital content, and interpreting identification information of original author, transferable rights, and revision permitting conditions indicated in the separated first metadata for the first digital content; a content revising unit revising the first digital content in accordance with the interpreted revision permitting conditions in response to a request from a secondary author; a metadata generator receiving portion ratio information transmitted from the server, the portion ratio information indicating a portion ratio of a portion revised by the secondary author and a remaining original portion created by the original author in the first digital content, and combining the portion ratio information and identification information of the secondary author received from the content revising unit with the first metadata to generate second metadata; and a metadata combiner combining the revised first digital content with the second metadata, and generating second digital content having indicated with the portion ratio of the original author and the secondary author.