{"id":"https://openalex.org/W116502645","doi":"https://doi.org/10.1007/978-3-642-32589-2_61","title":"Between Tree Patterns and Conjunctive Queries: Is There Tractability beyond Acyclicity?","display_name":"Between Tree Patterns and Conjunctive Queries: Is There Tractability beyond Acyclicity?","publication_year":2012,"publication_date":"2012-01-01","ids":{"openalex":"https://openalex.org/W116502645","doi":"https://doi.org/10.1007/978-3-642-32589-2_61","mag":"116502645"},"language":"en","primary_location":{"id":"doi:10.1007/978-3-642-32589-2_61","is_oa":false,"landing_page_url":"https://doi.org/10.1007/978-3-642-32589-2_61","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"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":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"},"type":"book-chapter","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/A5037986297","display_name":"Filip Murlak","orcid":"https://orcid.org/0000-0003-0989-3717"},"institutions":[{"id":"https://openalex.org/I4654613","display_name":"University of Warsaw","ror":"https://ror.org/039bjqg32","country_code":"PL","type":"education","lineage":["https://openalex.org/I4654613"]}],"countries":["PL"],"is_corresponding":true,"raw_author_name":"Filip Murlak","raw_affiliation_strings":["Institute of Informatics, University of Warsaw, Poland"],"affiliations":[{"raw_affiliation_string":"Institute of Informatics, University of Warsaw, Poland","institution_ids":["https://openalex.org/I4654613"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5059580078","display_name":"Micha\u0142 Ogi\u0144ski","orcid":null},"institutions":[{"id":"https://openalex.org/I4654613","display_name":"University of Warsaw","ror":"https://ror.org/039bjqg32","country_code":"PL","type":"education","lineage":["https://openalex.org/I4654613"]}],"countries":["PL"],"is_corresponding":false,"raw_author_name":"Micha\u0142 Ogi\u0144ski","raw_affiliation_strings":["Institute of Informatics, University of Warsaw, Poland"],"affiliations":[{"raw_affiliation_string":"Institute of Informatics, University of Warsaw, Poland","institution_ids":["https://openalex.org/I4654613"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5016377371","display_name":"Marcin Przyby\u0142ko","orcid":null},"institutions":[{"id":"https://openalex.org/I4654613","display_name":"University of Warsaw","ror":"https://ror.org/039bjqg32","country_code":"PL","type":"education","lineage":["https://openalex.org/I4654613"]}],"countries":["PL"],"is_corresponding":false,"raw_author_name":"Marcin Przyby\u0142ko","raw_affiliation_strings":["Institute of Informatics, University of Warsaw, Poland"],"affiliations":[{"raw_affiliation_string":"Institute of Informatics, University of Warsaw, Poland","institution_ids":["https://openalex.org/I4654613"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5037986297"],"corresponding_institution_ids":["https://openalex.org/I4654613"],"apc_list":{"value":5000,"currency":"EUR","value_usd":5392},"apc_paid":null,"fwci":0.6038,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.65083899,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"705","last_page":"717"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":1.0,"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":1.0,"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":0.9994000196456909,"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":0.9988999962806702,"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":0.8818809390068054},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7827860116958618},{"id":"https://openalex.org/keywords/tree","display_name":"Tree (set theory)","score":0.6887068748474121},{"id":"https://openalex.org/keywords/xml","display_name":"XML","score":0.5804059505462646},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.5709112882614136},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.22425350546836853},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.17637664079666138},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.17496919631958008},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.07809963822364807},{"id":"https://openalex.org/keywords/relational-database","display_name":"Relational database","score":0.07739531993865967}],"concepts":[{"id":"https://openalex.org/C65647387","wikidata":"https://www.wikidata.org/wiki/Q1781706","display_name":"Conjunctive query","level":3,"score":0.8818809390068054},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7827860116958618},{"id":"https://openalex.org/C113174947","wikidata":"https://www.wikidata.org/wiki/Q2859736","display_name":"Tree (set theory)","level":2,"score":0.6887068748474121},{"id":"https://openalex.org/C8797682","wikidata":"https://www.wikidata.org/wiki/Q2115","display_name":"XML","level":2,"score":0.5804059505462646},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.5709112882614136},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.22425350546836853},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.17637664079666138},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.17496919631958008},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.07809963822364807},{"id":"https://openalex.org/C5655090","wikidata":"https://www.wikidata.org/wiki/Q192588","display_name":"Relational database","level":2,"score":0.07739531993865967}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/978-3-642-32589-2_61","is_oa":false,"landing_page_url":"https://doi.org/10.1007/978-3-642-32589-2_61","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"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":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":33,"referenced_works":["https://openalex.org/W1516630410","https://openalex.org/W1520088189","https://openalex.org/W1558180533","https://openalex.org/W1565623053","https://openalex.org/W1573061520","https://openalex.org/W1580127085","https://openalex.org/W1589421353","https://openalex.org/W1882711135","https://openalex.org/W1893650332","https://openalex.org/W1927596640","https://openalex.org/W1966667033","https://openalex.org/W1979514837","https://openalex.org/W1983524017","https://openalex.org/W1992673035","https://openalex.org/W2032565909","https://openalex.org/W2033176822","https://openalex.org/W2050453134","https://openalex.org/W2057185776","https://openalex.org/W2063039776","https://openalex.org/W2070386554","https://openalex.org/W2102729564","https://openalex.org/W2103924667","https://openalex.org/W2105748890","https://openalex.org/W2112167310","https://openalex.org/W2133278242","https://openalex.org/W2135846285","https://openalex.org/W2147973254","https://openalex.org/W2151186348","https://openalex.org/W2479149412","https://openalex.org/W2561675875","https://openalex.org/W2616076417","https://openalex.org/W3104723580","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W4391375266","https://openalex.org/W2748952813","https://openalex.org/W2390279801","https://openalex.org/W2358668433","https://openalex.org/W4396701345","https://openalex.org/W2376932109","https://openalex.org/W2001405890","https://openalex.org/W1810918211","https://openalex.org/W1606535634","https://openalex.org/W2393259792"],"abstract_inverted_index":null,"counts_by_year":[{"year":2018,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}