{"id":"https://openalex.org/W2293371496","doi":"https://doi.org/10.1145/3043700","title":"Merging in the Horn Fragment","display_name":"Merging in the Horn Fragment","publication_year":2017,"publication_date":"2017-01-31","ids":{"openalex":"https://openalex.org/W2293371496","doi":"https://doi.org/10.1145/3043700","mag":"2293371496"},"language":"en","primary_location":{"id":"doi:10.1145/3043700","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3043700","pdf_url":null,"source":{"id":"https://openalex.org/S117153874","display_name":"ACM Transactions on Computational Logic","issn_l":"1529-3785","issn":["1529-3785","1557-945X"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319798","host_organization_name":"Association for Computing Machinery","host_organization_lineage":["https://openalex.org/P4310319798"],"host_organization_lineage_names":["Association for Computing Machinery"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"ACM Transactions on Computational Logic","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"http://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-64565","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5027573671","display_name":"Adrian Haret","orcid":"https://orcid.org/0000-0002-0247-5590"},"institutions":[{"id":"https://openalex.org/I145847075","display_name":"TU Wien","ror":"https://ror.org/04d836q62","country_code":"AT","type":"education","lineage":["https://openalex.org/I145847075"]}],"countries":["AT"],"is_corresponding":false,"raw_author_name":"Adrian Haret","raw_affiliation_strings":["TU Wien, Vienna, Austria","Institute of Information Systems, Vienna Univ. of Tech., Austria#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"TU Wien, Vienna, Austria","institution_ids":["https://openalex.org/I145847075"]},{"raw_affiliation_string":"Institute of Information Systems, Vienna Univ. of Tech., Austria#TAB#","institution_ids":["https://openalex.org/I145847075"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5075391677","display_name":"Stefan R\u00fcmmele","orcid":"https://orcid.org/0000-0002-8679-6913"},"institutions":[{"id":"https://openalex.org/I129604602","display_name":"The University of Sydney","ror":"https://ror.org/0384j8v12","country_code":"AU","type":"education","lineage":["https://openalex.org/I129604602"]},{"id":"https://openalex.org/I145847075","display_name":"TU Wien","ror":"https://ror.org/04d836q62","country_code":"AT","type":"education","lineage":["https://openalex.org/I145847075"]}],"countries":["AT","AU"],"is_corresponding":false,"raw_author_name":"Stefan R\u00fcmmele","raw_affiliation_strings":["University of Sydney, NSW, Australia","Institute of Information Systems, Vienna Univ. of Tech., Austria#TAB#"],"raw_orcid":"https://orcid.org/0000-0002-8679-6913","affiliations":[{"raw_affiliation_string":"University of Sydney, NSW, Australia","institution_ids":["https://openalex.org/I129604602"]},{"raw_affiliation_string":"Institute of Information Systems, Vienna Univ. of Tech., Austria#TAB#","institution_ids":["https://openalex.org/I145847075"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5006053030","display_name":"Stefan Woltran","orcid":"https://orcid.org/0000-0003-1594-8972"},"institutions":[{"id":"https://openalex.org/I145847075","display_name":"TU Wien","ror":"https://ror.org/04d836q62","country_code":"AT","type":"education","lineage":["https://openalex.org/I145847075"]}],"countries":["AT"],"is_corresponding":false,"raw_author_name":"Stefan Woltran","raw_affiliation_strings":["TU Wien, Vienna, Austria","Institute of Information Systems, Vienna Univ. of Tech., Austria#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"TU Wien, Vienna, Austria","institution_ids":["https://openalex.org/I145847075"]},{"raw_affiliation_string":"Institute of Information Systems, Vienna Univ. of Tech., Austria#TAB#","institution_ids":["https://openalex.org/I145847075"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.3986,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.68939909,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":94,"max":98},"biblio":{"volume":"18","issue":"1","first_page":"1","last_page":"32"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.9998999834060669,"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/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.9998999834060669,"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/T10215","display_name":"Semantic Web and Ontologies","score":0.995199978351593,"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/T10456","display_name":"Multi-Agent Systems and Negotiation","score":0.9879000186920166,"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/french-horn","display_name":"French horn","score":0.8916761875152588},{"id":"https://openalex.org/keywords/horn-clause","display_name":"Horn clause","score":0.774672269821167},{"id":"https://openalex.org/keywords/fragment","display_name":"Fragment (logic)","score":0.6728676557540894},{"id":"https://openalex.org/keywords/belief-revision","display_name":"Belief revision","score":0.580070972442627},{"id":"https://openalex.org/keywords/representation","display_name":"Representation (politics)","score":0.5737005472183228},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5445802211761475},{"id":"https://openalex.org/keywords/operator","display_name":"Operator (biology)","score":0.539793074131012},{"id":"https://openalex.org/keywords/knowledge-representation-and-reasoning","display_name":"Knowledge representation and reasoning","score":0.5096299648284912},{"id":"https://openalex.org/keywords/contraction","display_name":"Contraction (grammar)","score":0.45979544520378113},{"id":"https://openalex.org/keywords/representation-theorem","display_name":"Representation theorem","score":0.45968884229660034},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3757261633872986},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.35689371824264526},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.33765384554862976},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.30710408091545105},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.2658596634864807},{"id":"https://openalex.org/keywords/logic-programming","display_name":"Logic programming","score":0.20201608538627625},{"id":"https://openalex.org/keywords/linguistics","display_name":"Linguistics","score":0.09639963507652283},{"id":"https://openalex.org/keywords/psychology","display_name":"Psychology","score":0.08179989457130432},{"id":"https://openalex.org/keywords/law","display_name":"Law","score":0.06594762206077576}],"concepts":[{"id":"https://openalex.org/C152076505","wikidata":"https://www.wikidata.org/wiki/Q1126540","display_name":"French horn","level":2,"score":0.8916761875152588},{"id":"https://openalex.org/C189790780","wikidata":"https://www.wikidata.org/wiki/Q933932","display_name":"Horn clause","level":3,"score":0.774672269821167},{"id":"https://openalex.org/C2776235265","wikidata":"https://www.wikidata.org/wiki/Q18392052","display_name":"Fragment (logic)","level":2,"score":0.6728676557540894},{"id":"https://openalex.org/C128913409","wikidata":"https://www.wikidata.org/wiki/Q3566063","display_name":"Belief revision","level":2,"score":0.580070972442627},{"id":"https://openalex.org/C2776359362","wikidata":"https://www.wikidata.org/wiki/Q2145286","display_name":"Representation (politics)","level":3,"score":0.5737005472183228},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5445802211761475},{"id":"https://openalex.org/C17020691","wikidata":"https://www.wikidata.org/wiki/Q139677","display_name":"Operator (biology)","level":5,"score":0.539793074131012},{"id":"https://openalex.org/C161301231","wikidata":"https://www.wikidata.org/wiki/Q3478658","display_name":"Knowledge representation and reasoning","level":2,"score":0.5096299648284912},{"id":"https://openalex.org/C163415756","wikidata":"https://www.wikidata.org/wiki/Q126473","display_name":"Contraction (grammar)","level":2,"score":0.45979544520378113},{"id":"https://openalex.org/C2776230367","wikidata":"https://www.wikidata.org/wiki/Q7314222","display_name":"Representation theorem","level":2,"score":0.45968884229660034},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3757261633872986},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.35689371824264526},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.33765384554862976},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.30710408091545105},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.2658596634864807},{"id":"https://openalex.org/C128838566","wikidata":"https://www.wikidata.org/wiki/Q275603","display_name":"Logic programming","level":2,"score":0.20201608538627625},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.09639963507652283},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.08179989457130432},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.06594762206077576},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C19417346","wikidata":"https://www.wikidata.org/wiki/Q7922","display_name":"Pedagogy","level":1,"score":0.0},{"id":"https://openalex.org/C86339819","wikidata":"https://www.wikidata.org/wiki/Q407384","display_name":"Transcription factor","level":3,"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/C158448853","wikidata":"https://www.wikidata.org/wiki/Q425218","display_name":"Repressor","level":4,"score":0.0},{"id":"https://openalex.org/C94625758","wikidata":"https://www.wikidata.org/wiki/Q7163","display_name":"Politics","level":2,"score":0.0},{"id":"https://openalex.org/C55493867","wikidata":"https://www.wikidata.org/wiki/Q7094","display_name":"Biochemistry","level":1,"score":0.0},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.0},{"id":"https://openalex.org/C104317684","wikidata":"https://www.wikidata.org/wiki/Q7187","display_name":"Gene","level":2,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.1145/3043700","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3043700","pdf_url":null,"source":{"id":"https://openalex.org/S117153874","display_name":"ACM Transactions on Computational Logic","issn_l":"1529-3785","issn":["1529-3785","1557-945X"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319798","host_organization_name":"Association for Computing Machinery","host_organization_lineage":["https://openalex.org/P4310319798"],"host_organization_lineage_names":["Association for Computing Machinery"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"ACM Transactions on Computational Logic","raw_type":"journal-article"},{"id":"pmh:oai:repositum.tuwien.ac.at:1632602","is_oa":true,"landing_page_url":"http://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-64565","pdf_url":"http://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-64565","source":{"id":"https://openalex.org/S4306400493","display_name":"reposiTUm (TU Wien)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I145847075","host_organization_name":"TU Wien","host_organization_lineage":["https://openalex.org/I145847075"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Thesis"},{"id":"doi:10.34726/hss.2014.24791","is_oa":true,"landing_page_url":"https://doi.org/10.34726/hss.2014.24791","pdf_url":null,"source":{"id":"https://openalex.org/S4306400493","display_name":"reposiTUm (TU Wien)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I145847075","host_organization_name":"TU Wien","host_organization_lineage":["https://openalex.org/I145847075"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"article-journal"},{"id":"mag:2293371496","is_oa":false,"landing_page_url":"https://dblp.uni-trier.de/db/conf/ijcai/ijcai2015.html#HaretRW15","pdf_url":null,"source":{"id":"https://openalex.org/S4306419142","display_name":"International Conference on Artificial Intelligence","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"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":null,"raw_source_name":"International Conference on Artificial Intelligence","raw_type":null}],"best_oa_location":{"id":"pmh:oai:repositum.tuwien.ac.at:1632602","is_oa":true,"landing_page_url":"http://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-64565","pdf_url":"http://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-64565","source":{"id":"https://openalex.org/S4306400493","display_name":"reposiTUm (TU Wien)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I145847075","host_organization_name":"TU Wien","host_organization_lineage":["https://openalex.org/I145847075"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Thesis"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":false},"content_urls":{"pdf":"https://content.openalex.org/works/W2293371496.pdf"},"referenced_works_count":24,"referenced_works":["https://openalex.org/W1594099509","https://openalex.org/W1851216807","https://openalex.org/W1916913035","https://openalex.org/W1988791366","https://openalex.org/W2007457223","https://openalex.org/W2007807962","https://openalex.org/W2011524629","https://openalex.org/W2025889479","https://openalex.org/W2055706445","https://openalex.org/W2110955880","https://openalex.org/W2116204363","https://openalex.org/W2122085722","https://openalex.org/W2139807330","https://openalex.org/W2149420462","https://openalex.org/W2155595100","https://openalex.org/W2156474728","https://openalex.org/W2166566648","https://openalex.org/W2170431068","https://openalex.org/W2185012293","https://openalex.org/W2210653761","https://openalex.org/W2327787835","https://openalex.org/W2949318198","https://openalex.org/W3141728133","https://openalex.org/W6950368998"],"related_works":["https://openalex.org/W2600034178","https://openalex.org/W2149420462","https://openalex.org/W2007457223","https://openalex.org/W2156474728","https://openalex.org/W2327787835","https://openalex.org/W2170431068","https://openalex.org/W2166645709","https://openalex.org/W2122085722","https://openalex.org/W2292697683","https://openalex.org/W2384611872","https://openalex.org/W3102859930","https://openalex.org/W2039325453","https://openalex.org/W2395141332","https://openalex.org/W3141728133","https://openalex.org/W1583345481","https://openalex.org/W2242823443","https://openalex.org/W191549058","https://openalex.org/W2017592844","https://openalex.org/W147223905","https://openalex.org/W2998552951"],"abstract_inverted_index":{"Belief":[0],"merging":[1,82,102,107,114],"is":[2,36,53],"a":[3,25,96],"central":[4],"operation":[5],"within":[6,64],"the":[7,14,51,57,60,65,105],"field":[8],"of":[9,16,44,59,83],"belief":[10,34],"change":[11,35,61],"and":[12,79],"addresses":[13],"problem":[15],"combining":[17],"multiple,":[18],"possibly":[19],"mutually":[20],"inconsistent":[21],"knowledge":[22],"bases":[23],"into":[24],"single,":[26],"consistent":[27],"one.":[28],"A":[29],"current":[30],"research":[31],"trend":[32],"in":[33,46],"concerned":[37],"with":[38],"representation":[39,98],"theorems":[40],"tailored":[41],"to":[42,54],"fragments":[43],"logic,":[45],"particular":[47],"Horn":[48,77,80,84,101,113],"logic.":[49],"Hereby,":[50],"goal":[52],"guarantee":[55],"that":[56],"result":[58],"operations":[62],"stays":[63],"fragment":[66],"under":[67],"consideration.":[68],"While":[69],"several":[70],"such":[71],"results":[72],"have":[73],"been":[74,87],"obtained":[75],"for":[76,100],"revision":[78],"contraction,":[81],"theories":[85],"has":[86],"neglected":[88],"so":[89],"far.":[90],"In":[91],"this":[92],"article,":[93],"we":[94,110],"provide":[95],"novel":[97],"theorem":[99],"by":[103],"strengthening":[104],"standard":[106],"postulates.":[108,118],"Moreover,":[109],"present":[111],"concrete":[112],"operators":[115],"satisfying":[116],"all":[117]},"counts_by_year":[{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":4}],"updated_date":"2026-07-02T09:51:11.867554","created_date":"2025-10-10T00:00:00"}
