DOCUMENT MANAGEMENT SYSTEM

PROBLEM TO BE SOLVED: To facilitate retrieval and to simplify copy or correction by constituting data or files consisting of a document as objects different from a document object and spreading a link among them. SOLUTION: The document object itself does not have any attribute, the data consisting of the document are prepared as the objects different from the document object and by spreading the link, the respective document objects and the respective data express the documents respectively. When data are overlapped among plural documents, one piece of data are shared by spreading the link. For example, data 2 are shared by documents 1, 2 and (n). Besides, data (m) are shared by the documents 2 and (n). Therefore, since the data overlapped between the documents are shared, the number of times of matching in keyword retrieval is reduced and high-speed retrieval based on the hash method is enabled.