個人化搜尋服務之設計與實作

Abstract

在全球資訊網(WWW)上的搜尋服務是很重要的工具，在今日有數以千計的搜尋引擎存在於網際網路(Internet)上，並且各有其不同的介面(Interface)及特性。由於單一引擎搜尋結果離理想甚遠，所以需要整合這些異質性的搜尋引擎，目前雖有利用meta-broker實作的多引擎搜尋服務(Multi-Engine Search Service, MESS)系統，但由於不具一致性的介面，所以仍難以整合一個新的搜尋引擎，並且應用程式難以使用MESS來搜尋。 在本篇論文中，我們提出一個奠基於CORBA架構的網際網路搜尋服務(Internet Search Service, ISS )，CORBA是由OMG所制定之分散式物件技術的工業標準，我們依循共同物件服務規格(COSS)的樣式制定出ISS的介面，使其可容易的整合任何新的搜尋引擎至多重搜尋服務中，並且應用程式可容易的使用此一服務來查詢，甚至可應用於不同型態的搜尋服務。此外，我們亦實作了兩個異質性搜尋引擎代表的代理人，一個是Yahoo另一個是AltaVista。 因為個人化資訊提供較高的資訊價值，所以本篇論文亦為WWW環境的使用者提出一個個人化資訊過濾代理人的架構，此代理人的架構由三個層次的資訊過濾機制所組成。最後，我們整合網際網路搜尋服務代理人與個人化資訊過濾代理人成為一個完整的個人化搜尋服務系統。

Search service is an important tool in the World Wide Web. Currently there are thousands of search engines on the WWW, each has different interface and characteristic. Since single search engine is far from idea, we have to integrate these heterogeneous search engines. Though there are Multi-Engine Search Service (MESS) using meta-broker to implement at present, an unified interface is still missing. Therefore these MESSs are difficult to integrate a new search engine, and the applications that need search service ability are also difficult to use these MESSs. In this thesis, we propose an Internet Search Service (ISS) based on the Common Object Request Broker Architecture that is an industrial standard of distributed object oriented platform and is announced by OMG. We follow the style of Common Object Service Specification to define the interface of ISS, so that it is not only easy to integrate any new search engine into multi-search services, but also can be queried by application programs. In addition, two agents are implemented in this thesis, one is for Yahoo and the other is for Alta Vista. Because the personalized information is much desirable, in this thesis, we propose a Personal Information Filtering Agent (PIFA) for WWW users. The architecture of the agent is composed of three level of information filtering mechanism. Final, we integrate ISS with PIFA to become a fully personalized search service system.