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Proceedings of the 42nd International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR ’19)
WelcometoSIGIR2019,the42ndAnnualInternationalACMSIGIRConferenceonResearchandDevelop-mentinInformationRetrieval,thepremierscientificconferenceinthebroadareaofinformationretrieval.WearedelightedtowelcomeyoutotheMuseumofScienceandIndustrylocatedinthenorth-eastofParis.TheconferenceissupportedbytheFrenchAssociationforInformationRetrievalandApplications,whichorganizestheyearlyFrenchIRconference.Itsmembersactivelyparticipatedintheorganizationofthisconference.Wereceivedgoodqualitysubmissionsinalltracksandevents:fullpapers,shortpapers,demos,industrypa-pers,tutorials,workshops,andthedoctoralconsortium.Wew ouldliketothankeveryonewhocontributedtothepaperselectionprocess,including100SeniorProgramCommittee(SPC)members,317ProgramCommittee(PC)members,and80additionalreviewersfortheircontributionstopaperselection.