the mit press semantic web primer 2nd edition mar 2008外语英文电子书

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1、xxiWehavealsostartedtomaintainaWebsitewithmaterialtosupporttheuseofthisbook:.TheWebsitecon-tainsslidesforeachchapter,tobeusedforteaching,onlineversionsofcodefragmentsinthebook,andlinkstomaterialforfurtherreading.AcknowledgmentsWethankJeenBroekstra,MichelKlein,andMa

2、rtaSabouforpioneeringmuchofthismaterialinourcourseonWeb-basedknowledgerepresentationattheFreeUniversityinAmsterdam;AnnettetenTeije,ZharkoAleksovskiandWouterJansweijerforcriticallyreadingearlyversionsofthemanuscript;andLyndaHardmanandJaccovanOssenbruggenforspottingerrorsintheRDFchapter.WethankChrist

3、ophGrimmerandPeterKoenigforproofreadingpartsofthebookandassistingwiththecreationofthefiguresandwithLaTeXpro-cessing.Forthesecondeditionofthisbook,thefollowingpeoplegenerouslycon-tributedmaterial:JeenBroekstrawrotesection3.9onSPARQL;PeterMikaandMichelKleinwrotesection6.3ontheiropenacademiasystem;some

4、ofthetextontheBibstersysteminsection6.4wasdonatedbyPeterHaasefromhisPh.D.thesis;andsomeofthetextonOWL-SwasdonatedbyMartaSaboufromherPh.D.thesis.Also,wewishtothanktheMITPresspeoplefortheirassistancewiththefi-nalpreparationofthemanuscript,andChristopherManningforhisLATEX2εmacros.1TheSemanticWebVision1

5、.1Today’sWebTheWorldWideWebhaschangedthewaypeoplecommunicatewitheachotherandthewaybusinessisconducted.Itliesattheheartofarevolu-tionthatiscurrentlytransformingthedevelopedworldtowardaknowledgeeconomyand,morebroadlyspeaking,toaknowledgesociety.Thisdevelopmenthasalsochangedthewaywethinkofcomputers.Or

6、ig-inallytheywereusedforcomputingnumericalcalculations.Currentlytheirpredominantuseisforinformationprocessing,typicalapplicationsbeingdatabasesystems,textprocessing,andgames.Atpresentthereisatransi-tionoffocustowardtheviewofcomputersasentrypointstotheinformationhighways.Mostoftoday’sWebcontentissui

7、tableforhumanconsumption.EvenWebcontentthatisgeneratedautomaticallyfromdatabasesisusuallypresentedwithouttheoriginalstructuralinformationfoundindatabases.TypicalusesoftheWebtodayinvolvepeople’sseekingandmak