Definition Subject gateways are Internetservices which support systematic resourcediscovery. They provide links to resources(documents, objects, sites or services),predominantly accessible via the Internet. Theservice is based on resource description.
OriginBeyond Book Marks (Mckiernan, 1996).DESIRE I (Development Of a European Service for Information On Researchers and Education) (1997)DESIRE II (1999-2000)
•CharacteristicsOnline serviceIntellectual ProcessSubject DescriptionFacilitates NavigationSeries of Meta DataBibliographic Meta DataPrint and Electronic Resources
objective Promote Provide Current Information Provide Access to online & CD.ROM Provide quality of information Provide links of number of other site or document
Search Engine v/s Subject Gateways Search Engine Subject GatewaysGeneral resources are available It is a gathering place of discipline specific resources.It totally depends on the powerfulness High leveled of human input is there, asof the selected search engine along selected resources must meet a numberrhythm. of criteria applied by a librarian or academic, who ensure that only high quality ,relevant resources are included in the database.The result can be overwhelming, The result are specific, precise, andunmanageable ,full of irrelevant linked to relevant documents.references and are often too creative tomeet user need.
•Why library should go for subjectGateways?NaturalMetaphorBrowsing ,Reference desk.Guiding & helping users.
•Initiative of subject gatewaysLibraryspot.com:(http://www.libraryspot.com/)Liberians`index to the internet(LII) (http:lii.org/)Argus clearing House(http://www.clearinghouse.net/)Galaxy(http://galaxy.einet.net/)
•TypesGeneral Subject gateways::Google DirectoryYahoo! Directorywwwvirtual libraryAcademic Subject gateways::Ipl.org( Internet public library)InfomineAcademic info
What is portal• Portal provide diverse information in a unique and Unified way.• Portlet: Area dedicated on the Portal for displaying information.• It is a single point of access to information from different sources.
Need• Cope with growing demand of user.• For resolving information overload encountered by the user.
What a Portal DoesEnable Universal log inIntegration to other systemFacilitates messaging and notificationFacilitates multi-channel consistency
FeatureSecurityAccess different dataSearchPersonal contentPublish Content
What a portal is notInternetExtranetGroupwareKnowledge management solutionGroupware
Major portal contendersAlta vistaExciteInfoseekLycosMicrosoft internet startYahoo
What is future trend?• Hype cycle:- Graphic representation of maturity, adoption and social application of specific technologies.• Future growth of Portals have been greatly shown in the hype cycle reports.• Analyst’s reports had inquire the future development of portals.