Mauldin, M. L., and Leavitt, J. R. 1994. Web-agent related research at the CMT . In Proceedings of the ACM Special Interest Group on Networked Information Discovery and Retrieval. First collect the items to be recommended. Selection Next select from the collected items those best for a particular user.
Delivery Finally deliver the selected items to the user.
Most on line recommendation or search services can be described in this way. Mauldin, M. L., and Leavitt, J. R. 1994. Web-agent related research at the CMT . Indexes Web indexes are essentially retrospective information retrieval systems 3 . The index is built over a collection of documents found by a Web search process, which typically searches exhaustively rather than to fulfill a particular query.