{"id":"https://openalex.org/W1987667832","doi":"https://doi.org/10.1145/2806416.2806529","title":"Query Relaxation across Heterogeneous Data Sources","display_name":"Query Relaxation across Heterogeneous Data Sources","publication_year":2015,"publication_date":"2015-10-17","ids":{"openalex":"https://openalex.org/W1987667832","doi":"https://doi.org/10.1145/2806416.2806529","mag":"1987667832"},"language":"en","primary_location":{"id":"doi:10.1145/2806416.2806529","is_oa":true,"landing_page_url":"https://doi.org/10.1145/2806416.2806529","pdf_url":"http://dl.acm.org/ft_gateway.cfm?id=2806529&type=pdf","source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 24th ACM International on Conference on Information and Knowledge Management","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"http://dl.acm.org/ft_gateway.cfm?id=2806529&type=pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5079101020","display_name":"Verena Kantere","orcid":"https://orcid.org/0000-0002-3586-9406"},"institutions":[{"id":"https://openalex.org/I114457229","display_name":"University of Geneva","ror":"https://ror.org/01swzsf04","country_code":"CH","type":"education","lineage":["https://openalex.org/I114457229"]}],"countries":["CH"],"is_corresponding":true,"raw_author_name":"Verena Kantere","raw_affiliation_strings":["University of Geneva, Geneva, Switzerland"],"affiliations":[{"raw_affiliation_string":"University of Geneva, Geneva, Switzerland","institution_ids":["https://openalex.org/I114457229"]}]},{"author_position":"middle","author":{"id":null,"display_name":"George Orfanoudakis","orcid":null},"institutions":[{"id":"https://openalex.org/I174458059","display_name":"National Technical University of Athens","ror":"https://ror.org/03cx6bg69","country_code":"GR","type":"education","lineage":["https://openalex.org/I174458059"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"George Orfanoudakis","raw_affiliation_strings":["National Technical University of Athens, Athens, Greece"],"affiliations":[{"raw_affiliation_string":"National Technical University of Athens, Athens, Greece","institution_ids":["https://openalex.org/I174458059"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5014087838","display_name":"Anastasios Kementsietsidis","orcid":null},"institutions":[{"id":"https://openalex.org/I1291425158","display_name":"Google (United States)","ror":"https://ror.org/00njsd438","country_code":"US","type":"company","lineage":["https://openalex.org/I1291425158","https://openalex.org/I4210128969"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Anastasios Kementsietsidis","raw_affiliation_strings":["Google Inc., Mountain View, CA, USA","Google Inc., Mountain View, CA USA"],"affiliations":[{"raw_affiliation_string":"Google Inc., Mountain View, CA, USA","institution_ids":["https://openalex.org/I1291425158"]},{"raw_affiliation_string":"Google Inc., Mountain View, CA USA","institution_ids":["https://openalex.org/I1291425158"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5020449921","display_name":"Timos Sellis","orcid":"https://orcid.org/0000-0002-9067-5639"},"institutions":[{"id":"https://openalex.org/I82951845","display_name":"RMIT University","ror":"https://ror.org/04ttjf776","country_code":"AU","type":"education","lineage":["https://openalex.org/I82951845"]}],"countries":["AU"],"is_corresponding":false,"raw_author_name":"Timos Sellis","raw_affiliation_strings":["RMIT University, Melbourne, Australia"],"affiliations":[{"raw_affiliation_string":"RMIT University, Melbourne, Australia","institution_ids":["https://openalex.org/I82951845"]}]}],"institutions":[],"countries_distinct_count":4,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5079101020"],"corresponding_institution_ids":["https://openalex.org/I114457229"],"apc_list":null,"apc_paid":null,"fwci":2.1024,"has_fulltext":true,"cited_by_count":8,"citation_normalized_percentile":{"value":0.88470559,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":97},"biblio":{"volume":null,"issue":null,"first_page":"473","last_page":"482"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10215","display_name":"Semantic Web and Ontologies","score":0.9994000196456909,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":0.9966999888420105,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/rewriting","display_name":"Rewriting","score":0.8404648303985596},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7910118699073792},{"id":"https://openalex.org/keywords/schema","display_name":"Schema (genetic algorithms)","score":0.6926996111869812},{"id":"https://openalex.org/keywords/query-optimization","display_name":"Query optimization","score":0.601003885269165},{"id":"https://openalex.org/keywords/query-language","display_name":"Query language","score":0.5710358023643494},{"id":"https://openalex.org/keywords/relation","display_name":"Relation (database)","score":0.4480644464492798},{"id":"https://openalex.org/keywords/sargable","display_name":"Sargable","score":0.44226714968681335},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.4125102758407593},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.3809042274951935},{"id":"https://openalex.org/keywords/web-search-query","display_name":"Web search query","score":0.272320419549942},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.20165029168128967},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.19926190376281738},{"id":"https://openalex.org/keywords/search-engine","display_name":"Search engine","score":0.12076100707054138}],"concepts":[{"id":"https://openalex.org/C154690210","wikidata":"https://www.wikidata.org/wiki/Q1668499","display_name":"Rewriting","level":2,"score":0.8404648303985596},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7910118699073792},{"id":"https://openalex.org/C52146309","wikidata":"https://www.wikidata.org/wiki/Q7431116","display_name":"Schema (genetic algorithms)","level":2,"score":0.6926996111869812},{"id":"https://openalex.org/C157692150","wikidata":"https://www.wikidata.org/wiki/Q2919848","display_name":"Query optimization","level":2,"score":0.601003885269165},{"id":"https://openalex.org/C192028432","wikidata":"https://www.wikidata.org/wiki/Q845739","display_name":"Query language","level":2,"score":0.5710358023643494},{"id":"https://openalex.org/C25343380","wikidata":"https://www.wikidata.org/wiki/Q277521","display_name":"Relation (database)","level":2,"score":0.4480644464492798},{"id":"https://openalex.org/C192939062","wikidata":"https://www.wikidata.org/wiki/Q104840822","display_name":"Sargable","level":4,"score":0.44226714968681335},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.4125102758407593},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.3809042274951935},{"id":"https://openalex.org/C164120249","wikidata":"https://www.wikidata.org/wiki/Q995982","display_name":"Web search query","level":3,"score":0.272320419549942},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.20165029168128967},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.19926190376281738},{"id":"https://openalex.org/C97854310","wikidata":"https://www.wikidata.org/wiki/Q19541","display_name":"Search engine","level":2,"score":0.12076100707054138}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.1145/2806416.2806529","is_oa":true,"landing_page_url":"https://doi.org/10.1145/2806416.2806529","pdf_url":"http://dl.acm.org/ft_gateway.cfm?id=2806529&type=pdf","source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 24th ACM International on Conference on Information and Knowledge Management","raw_type":"proceedings-article"},{"id":"pmh:oai:alma.61RMIT_INST:11247134850001341","is_oa":false,"landing_page_url":"http://doi.org/10.1145/2806416.2806529","pdf_url":null,"source":{"id":"https://openalex.org/S4306402074","display_name":"RMIT Research Repository (RMIT University Library)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I82951845","host_organization_name":"RMIT University","host_organization_lineage":["https://openalex.org/I82951845"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"text"},{"id":"pmh:oai:figshare.com:article/27392349","is_oa":true,"landing_page_url":null,"pdf_url":null,"source":{"id":"https://openalex.org/S4377196282","display_name":"Figshare","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210132348","host_organization_name":"Figshare (United Kingdom)","host_organization_lineage":["https://openalex.org/I4210132348"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Text"},{"id":"pmh:oai:researchbank.swinburne.edu.au:cd987efb-ed37-4dd0-8d6d-47d6b456217b/1","is_oa":false,"landing_page_url":"http://hdl.handle.net/1959.3/413903","pdf_url":null,"source":{"id":"https://openalex.org/S4306401157","display_name":"Swinburne Research Bank (Swinburne University of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I57093077","host_organization_name":"Swinburne University of Technology","host_organization_lineage":["https://openalex.org/I57093077"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"CIKM 15 24th ACM International on Conference on Information and Knowledge Management (CIKM 2015), New York, Untited States, 19-23 October 2015, pp. 473-482","raw_type":""}],"best_oa_location":{"id":"doi:10.1145/2806416.2806529","is_oa":true,"landing_page_url":"https://doi.org/10.1145/2806416.2806529","pdf_url":"http://dl.acm.org/ft_gateway.cfm?id=2806529&type=pdf","source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 24th ACM International on Conference on Information and Knowledge Management","raw_type":"proceedings-article"},"sustainable_development_goals":[{"display_name":"Quality Education","score":0.4399999976158142,"id":"https://metadata.un.org/sdg/4"}],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W1987667832.pdf","grobid_xml":"https://content.openalex.org/works/W1987667832.grobid-xml"},"referenced_works_count":31,"referenced_works":["https://openalex.org/W1496294217","https://openalex.org/W1501488077","https://openalex.org/W1527866240","https://openalex.org/W1560604137","https://openalex.org/W1604794355","https://openalex.org/W1652914881","https://openalex.org/W1767402579","https://openalex.org/W1802447419","https://openalex.org/W1992673035","https://openalex.org/W1996863624","https://openalex.org/W2006249742","https://openalex.org/W2006367173","https://openalex.org/W2038281398","https://openalex.org/W2079329679","https://openalex.org/W2094394144","https://openalex.org/W2096021368","https://openalex.org/W2102729564","https://openalex.org/W2106207157","https://openalex.org/W2111071245","https://openalex.org/W2132353748","https://openalex.org/W2132694984","https://openalex.org/W2139276812","https://openalex.org/W2151406030","https://openalex.org/W2152191782","https://openalex.org/W2154093507","https://openalex.org/W2156664231","https://openalex.org/W2160770893","https://openalex.org/W4242587584","https://openalex.org/W6637154455","https://openalex.org/W6676390501","https://openalex.org/W6682452324"],"related_works":["https://openalex.org/W3125756434","https://openalex.org/W2152149667","https://openalex.org/W2556786504","https://openalex.org/W4244527061","https://openalex.org/W2096359267","https://openalex.org/W2392799717","https://openalex.org/W1977383094","https://openalex.org/W2469357693","https://openalex.org/W2388768270","https://openalex.org/W2413368787"],"abstract_inverted_index":{"The":[0,92],"fundamental":[1],"assumption":[2],"for":[3,14],"query":[4,27,44,79,119],"rewriting":[5,16,86],"in":[6,25,36,87],"heterogeneous":[7],"environments":[8],"is":[9,28,45,50,69,94],"that":[10,42,54,102],"the":[11,15,26,37,40,43,52,64,70,74,88,117,122],"mappings":[12,59,68,123],"used":[13],"are":[17],"complete,":[18],"i.e.,":[19],"every":[20],"relation":[21],"and":[22,34,63,112],"attribute":[23],"mentioned":[24],"associated,":[29],"through":[30],"mappings,":[31],"to":[32,83,109],"relations":[33],"attributes":[35],"schema":[38],"of":[39,58,66,90],"source":[41],"rewritten.":[46],"In":[47],"reality,":[48],"it":[49],"rarely":[51],"case":[53],"such":[55,107],"complete":[56],"sets":[57],"exist":[60],"between":[61],"sources,":[62],"presence":[65],"partial":[67],"norm":[71],"rather":[72],"than":[73],"exception.":[75],"So,":[76],"practically,":[77],"existing":[78],"answering":[80],"algorithms":[81],"fail":[82],"generate":[84],"any":[85],"majority":[89],"cases.":[91],"question":[93],"then":[95],"whether":[96,113],"we":[97,114],"can":[98,115],"somehow":[99],"relax":[100],"queries":[101],"cannot":[103],"be":[104],"rewritten":[105],"as":[106],"(due":[108],"insufficient":[110],"mappings),":[111],"identify":[116],"interesting":[118],"relaxations,":[120],"given":[121],"at":[124],"hand.":[125]},"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":3},{"year":2016,"cited_by_count":2}],"updated_date":"2026-04-21T08:09:41.155169","created_date":"2025-10-10T00:00:00"}
