access access_control ai algebra algorithm annotation answering application approximation authorization bag basic benchmark bipartie blog btree cache casestudy case_study citeulike classification clustering compensation compression computer containment control covering_index crassification database dataguide datalog data_mining datamodel delicious development directories distance ditionary dm document email evaluation fb fb_index filtering folksonomy grammar graph graph_schema gui hardware hierarchy histogram hui implementation index indexes ir join joins knuth labeling lda ldap learning library losslessness lsi machinelearning mapping mapreduce materialized_view math memory metrics mining ml model moving ne network nl nlp object ontology optimization ordering p2p partition path plan plsi probability processing programming projection_model query rag ram randomprojection rdb rdbbms rdbms recommendation refinement regular_expression research rewriting right sbm schemata search secure semantic semantics semistructured sensor simulation skelton social software statistics stream structural structural_join summary survey synopsis tag tagging taxonomy text theory tools toread tree tree-edit tripartie tutorial twig unread update vectrization versioning view visualization web web20 xml xmldb xpath xquery xslt