Constructing personal digital library by multi-search and customized category

The current search tools for retrieving information on the WWW are not suitable for building customized information repositories because these search tools are designed for general users with the result of only an unstructured collection of documents. We present a personal digital library capable of efficiently retrieving information on the World Wide Web. We adopt several new strategies to overcome the shortcomings of current tools. The first strategy, classification, merges and organizes the retrieved documents to put them in a structural hierarchical frame. The second strategy, user profile, saves time and bandwidth for the access of the documents and permits the users to build their own customized category structure. The third strategy, multi-search, capitalizes on the power of multiple search engines to broaden the domains of information sources and alleviate the overloading of a single search engine. Furthermore we derive in detail the techniques for speeding up the iterative process of clustering.