DOCUMENT SEARCH SYSTEM

原文（中国語）

A document search system stores a document search database indicating a content hierarchical structure of one or more documents. A document search system receives a search keyword input from a user, searches a document search database for items matching the search keyword, and determines a result item to be presented to the user from a plurality of items matching the search keyword by sequentially selecting items from a higher hierarchy to a lower hierarchy according to a content hierarchical structure including the plurality of items. The selection in at least one hierarchy follows selection by the user from a plurality of option items presented to the user.