{"id":"https://openalex.org/W2536272706","doi":"https://doi.org/10.1007/s00236-016-0282-1","title":"Conjunctive query containment over trees using schema information","display_name":"Conjunctive query containment over trees using schema information","publication_year":2016,"publication_date":"2016-10-18","ids":{"openalex":"https://openalex.org/W2536272706","doi":"https://doi.org/10.1007/s00236-016-0282-1","mag":"2536272706"},"language":"en","primary_location":{"id":"doi:10.1007/s00236-016-0282-1","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s00236-016-0282-1","pdf_url":null,"source":{"id":"https://openalex.org/S84409463","display_name":"Acta Informatica","issn_l":"0001-5903","issn":["0001-5903","1432-0525"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Acta Informatica","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5101796946","display_name":"Henrik Bj\u00f6rklund","orcid":"https://orcid.org/0000-0002-4696-9787"},"institutions":[{"id":"https://openalex.org/I90267481","display_name":"Ume\u00e5 University","ror":"https://ror.org/05kb8h459","country_code":"SE","type":"education","lineage":["https://openalex.org/I90267481"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Henrik Bj\u00f6rklund","raw_affiliation_strings":["Department of Computing Science, Ume\u00e5 University, Ume\u00e5, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computing Science, Ume\u00e5 University, Ume\u00e5, Sweden","institution_ids":["https://openalex.org/I90267481"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5016412428","display_name":"Wim Martens","orcid":"https://orcid.org/0000-0001-9480-3522"},"institutions":[{"id":"https://openalex.org/I54009628","display_name":"University of Bayreuth","ror":"https://ror.org/0234wmv40","country_code":"DE","type":"education","lineage":["https://openalex.org/I54009628"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Wim Martens","raw_affiliation_strings":["Institut f\u00fcr Informatik, Universit\u00e4t Bayreuth, Bayreuth, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institut f\u00fcr Informatik, Universit\u00e4t Bayreuth, Bayreuth, Germany","institution_ids":["https://openalex.org/I54009628"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5031710345","display_name":"Thomas Schwentick","orcid":"https://orcid.org/0000-0002-1062-922X"},"institutions":[{"id":"https://openalex.org/I200332995","display_name":"TU Dortmund University","ror":"https://ror.org/01k97gp34","country_code":"DE","type":"education","lineage":["https://openalex.org/I200332995"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Thomas Schwentick","raw_affiliation_strings":["Department of Computer Science, Technische Universit\u00e4t Dortmund, Dortmund, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Science, Technische Universit\u00e4t Dortmund, Dortmund, Germany","institution_ids":["https://openalex.org/I200332995"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5016412428"],"corresponding_institution_ids":["https://openalex.org/I54009628"],"apc_list":{"value":2990,"currency":"USD","value_usd":2990},"apc_paid":null,"fwci":0.5659,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.78262926,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":97},"biblio":{"volume":"55","issue":"1","first_page":"17","last_page":"56"},"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/T11106","display_name":"Data Management and Algorithms","score":0.9984999895095825,"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"}},{"id":"https://openalex.org/T10215","display_name":"Semantic Web and Ontologies","score":0.9972000122070312,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/conjunctive-query","display_name":"Conjunctive query","score":0.795882523059845},{"id":"https://openalex.org/keywords/undecidable-problem","display_name":"Undecidable problem","score":0.7689546942710876},{"id":"https://openalex.org/keywords/decidability","display_name":"Decidability","score":0.6945339441299438},{"id":"https://openalex.org/keywords/schema","display_name":"Schema (genetic algorithms)","score":0.6058980822563171},{"id":"https://openalex.org/keywords/boolean-conjunctive-query","display_name":"Boolean conjunctive query","score":0.5750930905342102},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5327715277671814},{"id":"https://openalex.org/keywords/tree-automaton","display_name":"Tree automaton","score":0.5084599256515503},{"id":"https://openalex.org/keywords/satisfiability","display_name":"Satisfiability","score":0.4874861240386963},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.4787830114364624},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.401324599981308},{"id":"https://openalex.org/keywords/automaton","display_name":"Automaton","score":0.34715014696121216},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.2606852650642395},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.2360404133796692},{"id":"https://openalex.org/keywords/relational-database","display_name":"Relational database","score":0.2276686728000641},{"id":"https://openalex.org/keywords/sargable","display_name":"Sargable","score":0.13480308651924133},{"id":"https://openalex.org/keywords/web-search-query","display_name":"Web search query","score":0.08585652709007263},{"id":"https://openalex.org/keywords/search-engine","display_name":"Search engine","score":0.08544585108757019}],"concepts":[{"id":"https://openalex.org/C65647387","wikidata":"https://www.wikidata.org/wiki/Q1781706","display_name":"Conjunctive query","level":3,"score":0.795882523059845},{"id":"https://openalex.org/C192034797","wikidata":"https://www.wikidata.org/wiki/Q3502995","display_name":"Undecidable problem","level":3,"score":0.7689546942710876},{"id":"https://openalex.org/C153269930","wikidata":"https://www.wikidata.org/wiki/Q430001","display_name":"Decidability","level":2,"score":0.6945339441299438},{"id":"https://openalex.org/C52146309","wikidata":"https://www.wikidata.org/wiki/Q7431116","display_name":"Schema (genetic algorithms)","level":2,"score":0.6058980822563171},{"id":"https://openalex.org/C24755975","wikidata":"https://www.wikidata.org/wiki/Q4943354","display_name":"Boolean conjunctive query","level":5,"score":0.5750930905342102},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5327715277671814},{"id":"https://openalex.org/C2778583254","wikidata":"https://www.wikidata.org/wiki/Q2872598","display_name":"Tree automaton","level":3,"score":0.5084599256515503},{"id":"https://openalex.org/C168773769","wikidata":"https://www.wikidata.org/wiki/Q1350299","display_name":"Satisfiability","level":2,"score":0.4874861240386963},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.4787830114364624},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.401324599981308},{"id":"https://openalex.org/C112505250","wikidata":"https://www.wikidata.org/wiki/Q787116","display_name":"Automaton","level":2,"score":0.34715014696121216},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.2606852650642395},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.2360404133796692},{"id":"https://openalex.org/C5655090","wikidata":"https://www.wikidata.org/wiki/Q192588","display_name":"Relational database","level":2,"score":0.2276686728000641},{"id":"https://openalex.org/C192939062","wikidata":"https://www.wikidata.org/wiki/Q104840822","display_name":"Sargable","level":4,"score":0.13480308651924133},{"id":"https://openalex.org/C164120249","wikidata":"https://www.wikidata.org/wiki/Q995982","display_name":"Web search query","level":3,"score":0.08585652709007263},{"id":"https://openalex.org/C97854310","wikidata":"https://www.wikidata.org/wiki/Q19541","display_name":"Search engine","level":2,"score":0.08544585108757019}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/s00236-016-0282-1","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s00236-016-0282-1","pdf_url":null,"source":{"id":"https://openalex.org/S84409463","display_name":"Acta Informatica","issn_l":"0001-5903","issn":["0001-5903","1432-0525"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Acta Informatica","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.6600000262260437,"id":"https://metadata.un.org/sdg/10","display_name":"Reduced inequalities"}],"awards":[{"id":"https://openalex.org/G1726120163","display_name":null,"funder_award_id":"621-2011-6080","funder_id":"https://openalex.org/F4320322581","funder_display_name":"Vetenskapsr\u00e5det"},{"id":"https://openalex.org/G3711144779","display_name":null,"funder_award_id":"MA 4938/2-1","funder_id":"https://openalex.org/F4320320879","funder_display_name":"Deutsche Forschungsgemeinschaft"}],"funders":[{"id":"https://openalex.org/F4320320879","display_name":"Deutsche Forschungsgemeinschaft","ror":"https://ror.org/018mejw64"},{"id":"https://openalex.org/F4320322581","display_name":"Vetenskapsr\u00e5det","ror":"https://ror.org/03zttf063"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":53,"referenced_works":["https://openalex.org/W116502645","https://openalex.org/W139189943","https://openalex.org/W1513019207","https://openalex.org/W1536883094","https://openalex.org/W1580127085","https://openalex.org/W1893650332","https://openalex.org/W1927596640","https://openalex.org/W1979514837","https://openalex.org/W1980951161","https://openalex.org/W1983510271","https://openalex.org/W1983524017","https://openalex.org/W1984218983","https://openalex.org/W1985578047","https://openalex.org/W2026745535","https://openalex.org/W2029752177","https://openalex.org/W2029824894","https://openalex.org/W2030473999","https://openalex.org/W2033176822","https://openalex.org/W2035020702","https://openalex.org/W2036145579","https://openalex.org/W2036564813","https://openalex.org/W2044744447","https://openalex.org/W2046652577","https://openalex.org/W2049832719","https://openalex.org/W2053393747","https://openalex.org/W2053455078","https://openalex.org/W2057841333","https://openalex.org/W2058208784","https://openalex.org/W2063039776","https://openalex.org/W2097244109","https://openalex.org/W2097542118","https://openalex.org/W2105843429","https://openalex.org/W2109486375","https://openalex.org/W2112167310","https://openalex.org/W2116976042","https://openalex.org/W2124876285","https://openalex.org/W2133278242","https://openalex.org/W2134781086","https://openalex.org/W2135846285","https://openalex.org/W2143127574","https://openalex.org/W2154985586","https://openalex.org/W2157308304","https://openalex.org/W2294034341","https://openalex.org/W2399079900","https://openalex.org/W2399482328","https://openalex.org/W2411138143","https://openalex.org/W2428820896","https://openalex.org/W2500135585","https://openalex.org/W2603910788","https://openalex.org/W3104723580","https://openalex.org/W4241108585","https://openalex.org/W4254380579","https://openalex.org/W6757244464"],"related_works":["https://openalex.org/W1483388050","https://openalex.org/W2137382312","https://openalex.org/W2004485491","https://openalex.org/W4298325446","https://openalex.org/W1492449180","https://openalex.org/W2964058024","https://openalex.org/W2156776134","https://openalex.org/W1556645209","https://openalex.org/W1894718966","https://openalex.org/W2536272706"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":1}],"updated_date":"2026-07-29T09:40:50.615796","created_date":"2025-10-10T00:00:00"}