{"id":"https://openalex.org/W2168324563","doi":null,"title":"Satisfying first-order constraints about time intervals","display_name":"Satisfying first-order constraints about time intervals","publication_year":1988,"publication_date":"1988-08-21","ids":{"openalex":"https://openalex.org/W2168324563","mag":"2168324563"},"language":"en","primary_location":{"id":"mag:2168324563","doi":null,"is_oa":false,"landing_page_url":"https://aaaipress.org/Papers/AAAI/1988/AAAI88-091.pdf","pdf_url":null,"source":{"id":"https://openalex.org/S4306420577","display_name":"National Conference on Artificial Intelligence","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"National Conference on Artificial Intelligence","raw_type":null},"volume":null,"type":"conference-paper","is_traditional":true,"indexed_in":[],"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/A5013541546","display_name":"Peter Bernard Ladkin","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210156228","display_name":"Kestrel Institute","ror":"https://ror.org/04deyvw92","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I4210156228"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Peter B. Ladkin","raw_affiliation_strings":["Kestrel Institute, Palo Alto, Ca#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Kestrel Institute, Palo Alto, Ca#TAB#","institution_ids":["https://openalex.org/I4210156228"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5013541546"],"corresponding_institution_ids":["https://openalex.org/I4210156228"],"apc_list":null,"apc_paid":null,"fwci":1.7495,"has_fulltext":false,"cited_by_count":27,"citation_normalized_percentile":{"value":0.85407066,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":93},"biblio":{"volume":null,"issue":null,"first_page":"512","last_page":"517"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11596","display_name":"Constraint Satisfaction and Optimization","score":0.9775000214576721,"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"}},"topics":[{"id":"https://openalex.org/T11596","display_name":"Constraint Satisfaction and Optimization","score":0.9775000214576721,"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/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.02160000056028366,"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/T10906","display_name":"AI-based Problem Solving and Planning","score":0.00019999999494757503,"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/allen-s-interval-algebra","display_name":"Allen's interval algebra","score":0.7110000252723694},{"id":"https://openalex.org/keywords/time-intervals","display_name":"time intervals","score":0.5820000171661377},{"id":"https://openalex.org/keywords/first-order-constraints","display_name":"first-order constraints","score":0.7900000214576721},{"id":"https://openalex.org/keywords/constraint-satisfaction","display_name":"constraint satisfaction","score":0.9290000200271606},{"id":"https://openalex.org/keywords/consistency-checking","display_name":"consistency checking","score":0.9739999771118164},{"id":"https://openalex.org/keywords/quantified-formulas","display_name":"quantified formulas","score":0.7260000109672546},{"id":"https://openalex.org/keywords/boolean-constraints","display_name":"Boolean constraints","score":0.8360000252723694},{"id":"https://openalex.org/keywords/temporal-reasoning","display_name":"temporal reasoning","score":0.8529999852180481}],"concepts":[{"id":"https://openalex.org/C137105694","wikidata":"https://www.wikidata.org/wiki/Q3407510","display_name":"Local consistency","level":4,"score":0.8065998554229736},{"id":"https://openalex.org/C199622910","wikidata":"https://www.wikidata.org/wiki/Q1128326","display_name":"Constraint satisfaction problem","level":3,"score":0.6837276220321655},{"id":"https://openalex.org/C2776036281","wikidata":"https://www.wikidata.org/wiki/Q48769818","display_name":"Constraint (computer-aided design)","level":2,"score":0.641285240650177},{"id":"https://openalex.org/C2777686260","wikidata":"https://www.wikidata.org/wiki/Q144037","display_name":"Calculus (dental)","level":2,"score":0.5734731554985046},{"id":"https://openalex.org/C2778067643","wikidata":"https://www.wikidata.org/wiki/Q166507","display_name":"Interval (graph theory)","level":2,"score":0.5672833323478699},{"id":"https://openalex.org/C2776436953","wikidata":"https://www.wikidata.org/wiki/Q5163215","display_name":"Consistency (knowledge bases)","level":2,"score":0.5578107237815857},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5507907271385193},{"id":"https://openalex.org/C44616089","wikidata":"https://www.wikidata.org/wiki/Q30158686","display_name":"Constraint satisfaction","level":3,"score":0.5306186676025391},{"id":"https://openalex.org/C33695381","wikidata":"https://www.wikidata.org/wiki/Q7804838","display_name":"Time-scale calculus","level":3,"score":0.41851356625556946},{"id":"https://openalex.org/C2776359362","wikidata":"https://www.wikidata.org/wiki/Q2145286","display_name":"Representation (politics)","level":3,"score":0.4142211377620697},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.365686297416687},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.32627227902412415},{"id":"https://openalex.org/C117312493","wikidata":"https://www.wikidata.org/wiki/Q2035437","display_name":"Multivariable calculus","level":2,"score":0.279868483543396},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.1654503047466278},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.05927649140357971},{"id":"https://openalex.org/C94625758","wikidata":"https://www.wikidata.org/wiki/Q7163","display_name":"Politics","level":2,"score":0.0},{"id":"https://openalex.org/C199343813","wikidata":"https://www.wikidata.org/wiki/Q12128","display_name":"Dentistry","level":1,"score":0.0},{"id":"https://openalex.org/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.0},{"id":"https://openalex.org/C133731056","wikidata":"https://www.wikidata.org/wiki/Q4917288","display_name":"Control engineering","level":1,"score":0.0},{"id":"https://openalex.org/C49937458","wikidata":"https://www.wikidata.org/wiki/Q2599292","display_name":"Probabilistic logic","level":2,"score":0.0},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"mag:2168324563","doi":null,"is_oa":false,"landing_page_url":"https://aaaipress.org/Papers/AAAI/1988/AAAI88-091.pdf","pdf_url":null,"source":{"id":"https://openalex.org/S4306420577","display_name":"National Conference on Artificial Intelligence","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"National Conference on Artificial Intelligence","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":8,"referenced_works":["https://openalex.org/W87723076","https://openalex.org/W1488267121","https://openalex.org/W1528419757","https://openalex.org/W1567492448","https://openalex.org/W2069683773","https://openalex.org/W2122540544","https://openalex.org/W2161484642","https://openalex.org/W2166659989"],"related_works":["https://openalex.org/W1577435617","https://openalex.org/W2106649793","https://openalex.org/W2103596345","https://openalex.org/W16999252","https://openalex.org/W4392238459","https://openalex.org/W1567492448","https://openalex.org/W115604927","https://openalex.org/W160379775","https://openalex.org/W2189441267","https://openalex.org/W137477649"],"abstract_inverted_index":{"James":[0],"Allen":[1,32],"denned":[2],"a":[3,11,74,99,103,113],"calculus":[4],"of":[5,13,50,102,118,130],"time":[6],"intervals":[7,46,124],"in":[8,20,38,68,93],"[All83],":[9],"as":[10],"representation":[12],"temporal":[14],"knowledge":[15],"that":[16,80,88,125],"could":[17],"be":[18],"used":[19],"AI.":[21],"We":[22,72,86,107],"shall":[23],"call":[24],"this":[25,94,109],"the":[26,39,69,131],"Interval":[27,40,70,132],"Calculus.":[28,41,71,133],"In":[29],"his":[30],"paper,":[31],"investigated":[33],"specification":[34],"and":[35,59,122],"constraint":[36,91,101],"satisfaction":[37],"Other":[42],"constraint-satisfaction":[43,60],"algorithms":[44],"for":[45,115],"have":[47],"considered":[48],"subclasses":[49],"Boolean":[51,100],"formulas":[52,67,129],"only.":[53],"The":[54],"methods":[55],"herein":[56],"extend":[57],"consistency-checking":[58],"procedures":[61],"to":[62,83,98,111],"finitely":[63],"many":[64],"arbitrary":[65,119,127],"quantified":[66,120],"use":[73,108],"first-order":[75,90],"theory":[76,95],"from":[77],"[LadMad87.1,":[78],"LadMad88.1],":[79],"precisely":[81],"corresponds":[82],"Allen's":[84],"calculus.":[85],"show":[87],"every":[89],"expressible":[92],"is":[96],"equivalent":[97],"particular":[104],"restricted":[105],"form.":[106],"result":[110],"obtain":[112],"procedure":[114],"detecting":[116],"consistency":[117],"formulas,":[121],"finding":[123],"satisfy":[126],"consistent":[128]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2015,"cited_by_count":1}],"updated_date":"2026-10-16T09:59:22.235173","created_date":"2016-06-24T00:00:00"}