The Comparative Study Of The Web Scale Discovery Service Systems

In the information age, information is increasingly growing.On the one hand, users canget more conveniences from information.On the other hand, users are difficult to getavailable information from the vast information resources. Web search engines like Googlebring opportunities and challenges to the library.Less and less users pay attention to accessinformation resources from libraries. To make a good use of the new technologies and servicemethod and combine them with the information resources, which is the most essential oflibraries. Therefore, users can approach available information more convenient.The birth of web-scale discovery service system，which provides a new option of libraryinformation resources integration. Web-scale discovery service system can achieve a one-stopsearch,including on local, open access and ordering of library information resources invarious forms.Web-scale discovery service system represents digital information resourcesintegration in the future.This paper states related background information in web-scale discovery system andfocuses on analysis the conception, background, system principles and four applications ofweb-scale discovery service system. Comparison and analysis on Worldcat Local, Summon,Primo, EDS in system architecture, interface and search, metadata and Web2.0features.Moreover, the comprehensive evaluation about advantages, disadvantage and features is infour Web-scale discovery service systems. Last but not least, the paper provides appropriaterecommendations for information institutes to select the reasonable web-scale discoveryservice system, which bases on comparison and analysis on four Web-scale discovery servicesystem.