{"id":"https://openalex.org/W2025456831","doi":"https://doi.org/10.1016/s0004-3702(97)00021-0","title":"Twenty-one large tractable subclasses of Allen's algebra","display_name":"Twenty-one large tractable subclasses of Allen's algebra","publication_year":1997,"publication_date":"1997-06-01","ids":{"openalex":"https://openalex.org/W2025456831","doi":"https://doi.org/10.1016/s0004-3702(97)00021-0","mag":"2025456831"},"language":"en","primary_location":{"id":"doi:10.1016/s0004-3702(97)00021-0","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0004-3702(97)00021-0","pdf_url":null,"source":{"id":"https://openalex.org/S196139623","display_name":"Artificial Intelligence","issn_l":"0004-3702","issn":["0004-3702","1872-7921"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Artificial Intelligence","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/A5069914612","display_name":"Thomas Drakengren","orcid":null},"institutions":[{"id":"https://openalex.org/I102134673","display_name":"Link\u00f6ping University","ror":"https://ror.org/05ynxx418","country_code":"SE","type":"education","lineage":["https://openalex.org/I102134673"]}],"countries":["SE"],"is_corresponding":true,"raw_author_name":"Thomas Drakengren","raw_affiliation_strings":["Department of Computer and Information Science, Link\u00f6ping University, S-581 83 Link\u00f6ping, Sweden"],"affiliations":[{"raw_affiliation_string":"Department of Computer and Information Science, Link\u00f6ping University, S-581 83 Link\u00f6ping, Sweden","institution_ids":["https://openalex.org/I102134673"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5101920004","display_name":"Peter J\u00f6nsson","orcid":"https://orcid.org/0000-0002-5288-3330"},"institutions":[{"id":"https://openalex.org/I102134673","display_name":"Link\u00f6ping University","ror":"https://ror.org/05ynxx418","country_code":"SE","type":"education","lineage":["https://openalex.org/I102134673"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Peter Jonsson","raw_affiliation_strings":["Department of Computer and Information Science, Link\u00f6ping University, S-581 83 Link\u00f6ping, Sweden"],"affiliations":[{"raw_affiliation_string":"Department of Computer and Information Science, Link\u00f6ping University, S-581 83 Link\u00f6ping, Sweden","institution_ids":["https://openalex.org/I102134673"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5069914612"],"corresponding_institution_ids":["https://openalex.org/I102134673"],"apc_list":{"value":3670,"currency":"USD","value_usd":3670},"apc_paid":null,"fwci":4.0569,"has_fulltext":false,"cited_by_count":37,"citation_normalized_percentile":{"value":0.93624305,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"93","issue":"1-2","first_page":"297","last_page":"319"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11596","display_name":"Constraint Satisfaction and Optimization","score":0.9994999766349792,"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/T11596","display_name":"Constraint Satisfaction and Optimization","score":0.9994999766349792,"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/T11727","display_name":"Advanced Algebra and Logic","score":0.9847000241279602,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/T11063","display_name":"Rough Sets and Fuzzy Logic","score":0.9815999865531921,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/satisfiability","display_name":"Satisfiability","score":0.6875392198562622},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.6803945899009705},{"id":"https://openalex.org/keywords/interval","display_name":"Interval (graph theory)","score":0.6247580051422119},{"id":"https://openalex.org/keywords/consistency","display_name":"Consistency (knowledge bases)","score":0.611405074596405},{"id":"https://openalex.org/keywords/subclass","display_name":"Subclass","score":0.6009407639503479},{"id":"https://openalex.org/keywords/algebra-over-a-field","display_name":"Algebra over a field","score":0.4925594925880432},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.4635927081108093},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.4433038532733917},{"id":"https://openalex.org/keywords/path","display_name":"Path (computing)","score":0.42512643337249756},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.257159948348999},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.14696288108825684}],"concepts":[{"id":"https://openalex.org/C168773769","wikidata":"https://www.wikidata.org/wiki/Q1350299","display_name":"Satisfiability","level":2,"score":0.6875392198562622},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.6803945899009705},{"id":"https://openalex.org/C2778067643","wikidata":"https://www.wikidata.org/wiki/Q166507","display_name":"Interval (graph theory)","level":2,"score":0.6247580051422119},{"id":"https://openalex.org/C2776436953","wikidata":"https://www.wikidata.org/wiki/Q5163215","display_name":"Consistency (knowledge bases)","level":2,"score":0.611405074596405},{"id":"https://openalex.org/C2776194381","wikidata":"https://www.wikidata.org/wiki/Q3965271","display_name":"Subclass","level":3,"score":0.6009407639503479},{"id":"https://openalex.org/C136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","level":2,"score":0.4925594925880432},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.4635927081108093},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.4433038532733917},{"id":"https://openalex.org/C2777735758","wikidata":"https://www.wikidata.org/wiki/Q817765","display_name":"Path (computing)","level":2,"score":0.42512643337249756},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.257159948348999},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.14696288108825684},{"id":"https://openalex.org/C159654299","wikidata":"https://www.wikidata.org/wiki/Q79460","display_name":"Antibody","level":2,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C203014093","wikidata":"https://www.wikidata.org/wiki/Q101929","display_name":"Immunology","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/s0004-3702(97)00021-0","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0004-3702(97)00021-0","pdf_url":null,"source":{"id":"https://openalex.org/S196139623","display_name":"Artificial Intelligence","issn_l":"0004-3702","issn":["0004-3702","1872-7921"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Artificial Intelligence","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.4300000071525574,"display_name":"Reduced inequalities","id":"https://metadata.un.org/sdg/10"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":26,"referenced_works":["https://openalex.org/W94442452","https://openalex.org/W122486517","https://openalex.org/W159907047","https://openalex.org/W1519739962","https://openalex.org/W1560996605","https://openalex.org/W1568415078","https://openalex.org/W1784944639","https://openalex.org/W1803471726","https://openalex.org/W1932206085","https://openalex.org/W1972734518","https://openalex.org/W1975935536","https://openalex.org/W1996011776","https://openalex.org/W2001143077","https://openalex.org/W2039392113","https://openalex.org/W2086619822","https://openalex.org/W2119456262","https://openalex.org/W2122136744","https://openalex.org/W2134358914","https://openalex.org/W2135432705","https://openalex.org/W2161484642","https://openalex.org/W2346933546","https://openalex.org/W2901168695","https://openalex.org/W6604917076","https://openalex.org/W6631110669","https://openalex.org/W6633716976","https://openalex.org/W6672006260"],"related_works":["https://openalex.org/W3135151721","https://openalex.org/W316900803","https://openalex.org/W2025265121","https://openalex.org/W2037210200","https://openalex.org/W1511067427","https://openalex.org/W1549155385","https://openalex.org/W1989643483","https://openalex.org/W2060980616","https://openalex.org/W2009011029","https://openalex.org/W2912813468"],"abstract_inverted_index":null,"counts_by_year":[{"year":2021,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2026-04-04T16:13:02.066488","created_date":"2025-10-10T00:00:00"}