Contents directory service system

A directory service system for content comprising:

• a user terminal serving as a client;
• a computer network to which a user makes connection from the user terminal;
• a content server master set to be accessed via the computer network;
• and
• a content server slave set,
• characterized in that attribute information to be used as a key when content is retrieved and extracted or selected is included in content to be stored in the content server master set and the content server slave set,
• information indicating a location of the content server slave set to be connected to the computer network and authority for accessing the content stored in the content server slave set are set in the content server master set, and
• charging information concerning a price for using the content is included in the attribute information included in the content to be stored in the content server master set and the content server slave set, whereby the directory service system for content performs:
• processing in which, in response to a request for a desired content from the user terminal, the content server master set receives the request;
• processing for retrieving and extracting content corresponding to a desired condition of the requested content from the content server master set and the content server slave set;
• and
• processing for sending an extracted result to the user terminal, and is capable of performing charging processing based upon the attribute information.