using collaborative filtering to weave an information tapestry.pdf

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1、nnnnnnunnnma~nMm~DUlFILTERIHGUsingtOweaveanInformationDavidGoldberg,DavidNichols,BrianM.Oki,andDouglas7~rryTapestryisanexperimentalmailsystemdevelopedattheXeroxPaloAltoResearchCenter.ThemotivationforTapestrycomesfromtheincreasinguseofelectronicmail,whichisresultinginu

2、sersbeinginundatedbyahugestreamofincomingdocuments[2,7,12].Onewaytohandlelargevolumesofmailistoprovidemailinglists,enablinguserstosubscribeonlytothoselistsofinteresttothem.However,asillustratedinFigure1,thesetofdocumentsofinteresttoaparticularuserrarelymapneatlytoexis

3、tinglists.Abettersolutionisforausertospecifyafi'lterthatscansalllists,selectinginterestingdocumentsnomatterwhatlisttheyarein.Severalmailsystemssupportfilteringbasedonadocument'scontents[3,5,6,8].AbasictenetoftheTapestryworkisthatmoreeffectivefilteringcanbedonebyinvolv

4、inghumansinthefilteringprocess.Inadditiontocontent-basedfiltering,theTapestrysystemwasdesignedandbuilttosupportcoUaborativefi'ltering.Collaborativefilteringsimplymeansthatpeoplecollaboratetohelponeanotherperformfilteringbyrecordingtheirreactionstodocumentstheyread.Suc

5、hreactionsmaybethatadocumentwasparticularlyinteresting(orparticularlyuninteresting).Thesereactions,moregenerallycalledannotations,canbeaccessedbyothers'filters.Oneapplicationofannotationsisinsupportofmoderatednewsgroups.￠OMMUHiCA~IOHSOPTIllllACN/December1992/Vo

6、.35,No

7、.126~IIIIIIIIIIIa=aH=:aaa==FILTERING(a)Electronicmailoverload(b)UsingdistributionlistsJ(c)ConventionalfilteringPlllUre1.(a)electronicmailover-forthosearticlesthatSmithendorsedacterizesthem,andyoudon'thaveload;(b)usingdistributionlists;withanannotation.timetoreadthemal

8、lyourself.How-(c)conventionalfiltering;(d)col-laborativefilteringImplicitfeedbackfromusers(e.g.,ever,youknowthatSmith,Jonesandsomeusersentareplytoadocu-O'Brienreadallofcomp.unix-Currently,moderatedgroupshavement)canalsobeutilizedinthefil-wizardsnewsgroupmaterial,andas

9、inglemoderator,whoselectsasub-teringprocess.Forexample,supposereplytothemoreinterestingdocu-setofmessagestobepostedtotheyouw