in a document information processing apparatus handling a large amount of documents , when a document is registered , retrieval data for document retrieval is created for each registered document . moreover , for each registered document , there is produced an access control table in which information indicating accessibility of groups including users as document retrievers for the document is registered . when a user desires to retrieve a document , accessibility of the user as the retriever is determined in accordance with the access control table for documents retrieved with retrieval data .