information retrieval
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algorithmindexquerydatabasesearch engineprecisionrecallrelevancemetadatakeywordrankingcorpusdocumentnatural language processingtokenizationstemminglemmatizationclusteringclassificationtaxonomyontologyknowledge basehyperlinksnippetlatencythroughputcacherepositoryarchivecatalogsearcheruser interfacefeedback loopindexingparsingserializationcompressionencryptionbig datadata miningmachine learningneural networkembeddingmanifold learningheuristicoptimizationschemaSQLNoSQLdisambiguationsynonymypolysemyhypernymyhyponymylexiconvocabularysyntaxsemanticspragmatics