{"id":"https://openalex.org/W2036351221","doi":"https://doi.org/10.1016/0169-023x(95)00022-k","title":"Manipulation operations for an interval-extended relational model","display_name":"Manipulation operations for an interval-extended relational model","publication_year":1995,"publication_date":"1995-10-01","ids":{"openalex":"https://openalex.org/W2036351221","doi":"https://doi.org/10.1016/0169-023x(95)00022-k","mag":"2036351221"},"language":"en","primary_location":{"id":"doi:10.1016/0169-023x(95)00022-k","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0169-023x(95)00022-k","pdf_url":null,"source":{"id":"https://openalex.org/S136993123","display_name":"Data & Knowledge Engineering","issn_l":"0169-023X","issn":["0169-023X","1872-6933"],"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":"Data & Knowledge Engineering","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/A5108493610","display_name":"Nikos A. Lorentzos","orcid":null},"institutions":[{"id":"https://openalex.org/I109954829","display_name":"Agricultural University of Athens","ror":"https://ror.org/03xawq568","country_code":"GR","type":"education","lineage":["https://openalex.org/I109954829"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Nikos A. Lorentzos","raw_affiliation_strings":["Informatics Lab, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Informatics Lab, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece","institution_ids":["https://openalex.org/I109954829"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5051400056","display_name":"Alexandra Poulovassilis","orcid":"https://orcid.org/0000-0001-8981-4104"},"institutions":[{"id":"https://openalex.org/I183935753","display_name":"King's College London","ror":"https://ror.org/0220mzb33","country_code":"GB","type":"education","lineage":["https://openalex.org/I124357947","https://openalex.org/I183935753"]}],"countries":["GB"],"is_corresponding":true,"raw_author_name":"Alexandra Poulovassilis","raw_affiliation_strings":["Dept. of Computer Science, King's College London, Strand, London WC2R 2LS, UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dept. of Computer Science, King's College London, Strand, London WC2R 2LS, UK","institution_ids":["https://openalex.org/I183935753"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5026232625","display_name":"Carol Small","orcid":null},"institutions":[{"id":"https://openalex.org/I98259816","display_name":"Birkbeck, University of London","ror":"https://ror.org/02mb95055","country_code":"GB","type":"education","lineage":["https://openalex.org/I124357947","https://openalex.org/I98259816"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Carol Small","raw_affiliation_strings":["Dept. of Computer Science, Birkbeck College, Malet Street, London WC1E 7HX, UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dept. of Computer Science, Birkbeck College, Malet Street, London WC1E 7HX, UK","institution_ids":["https://openalex.org/I98259816"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5051400056"],"corresponding_institution_ids":["https://openalex.org/I183935753"],"apc_list":{"value":2590,"currency":"USD","value_usd":2590},"apc_paid":null,"fwci":0.4538,"has_fulltext":false,"cited_by_count":15,"citation_normalized_percentile":{"value":0.65051395,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":94,"max":96},"biblio":{"volume":"17","issue":"1","first_page":"1","last_page":"29"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":0.9998999834060669,"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"}},"topics":[{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":0.9998999834060669,"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/T10317","display_name":"Advanced Database Systems and Queries","score":0.9987000226974487,"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/T10215","display_name":"Semantic Web and Ontologies","score":0.9945999979972839,"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/relation","display_name":"Relation (database)","score":0.741195023059845},{"id":"https://openalex.org/keywords/correctness","display_name":"Correctness","score":0.727954089641571},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6686875820159912},{"id":"https://openalex.org/keywords/equivalence-relation","display_name":"Equivalence relation","score":0.6486067771911621},{"id":"https://openalex.org/keywords/tuple","display_name":"Tuple","score":0.614931583404541},{"id":"https://openalex.org/keywords/equivalence","display_name":"Equivalence (formal languages)","score":0.6038492321968079},{"id":"https://openalex.org/keywords/interval","display_name":"Interval (graph theory)","score":0.5568456053733826},{"id":"https://openalex.org/keywords/property","display_name":"Property (philosophy)","score":0.5372083187103271},{"id":"https://openalex.org/keywords/relational-database","display_name":"Relational database","score":0.48440414667129517},{"id":"https://openalex.org/keywords/relational-model","display_name":"Relational model","score":0.48135048151016235},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.4696228802204132},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.4642276167869568},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.3676905632019043},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.35374972224235535},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2541942596435547},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.15461954474449158},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.14726188778877258}],"concepts":[{"id":"https://openalex.org/C25343380","wikidata":"https://www.wikidata.org/wiki/Q277521","display_name":"Relation (database)","level":2,"score":0.741195023059845},{"id":"https://openalex.org/C55439883","wikidata":"https://www.wikidata.org/wiki/Q360812","display_name":"Correctness","level":2,"score":0.727954089641571},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6686875820159912},{"id":"https://openalex.org/C156103551","wikidata":"https://www.wikidata.org/wiki/Q130998","display_name":"Equivalence relation","level":2,"score":0.6486067771911621},{"id":"https://openalex.org/C118930307","wikidata":"https://www.wikidata.org/wiki/Q600590","display_name":"Tuple","level":2,"score":0.614931583404541},{"id":"https://openalex.org/C2780069185","wikidata":"https://www.wikidata.org/wiki/Q7977945","display_name":"Equivalence (formal languages)","level":2,"score":0.6038492321968079},{"id":"https://openalex.org/C2778067643","wikidata":"https://www.wikidata.org/wiki/Q166507","display_name":"Interval (graph theory)","level":2,"score":0.5568456053733826},{"id":"https://openalex.org/C189950617","wikidata":"https://www.wikidata.org/wiki/Q937228","display_name":"Property (philosophy)","level":2,"score":0.5372083187103271},{"id":"https://openalex.org/C5655090","wikidata":"https://www.wikidata.org/wiki/Q192588","display_name":"Relational database","level":2,"score":0.48440414667129517},{"id":"https://openalex.org/C40207289","wikidata":"https://www.wikidata.org/wiki/Q755662","display_name":"Relational model","level":3,"score":0.48135048151016235},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.4696228802204132},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.4642276167869568},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.3676905632019043},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.35374972224235535},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2541942596435547},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.15461954474449158},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.14726188778877258},{"id":"https://openalex.org/C111472728","wikidata":"https://www.wikidata.org/wiki/Q9471","display_name":"Epistemology","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0169-023x(95)00022-k","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0169-023x(95)00022-k","pdf_url":null,"source":{"id":"https://openalex.org/S136993123","display_name":"Data & Knowledge Engineering","issn_l":"0169-023X","issn":["0169-023X","1872-6933"],"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":"Data & Knowledge Engineering","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":37,"referenced_works":["https://openalex.org/W1524668325","https://openalex.org/W1562294322","https://openalex.org/W1576744908","https://openalex.org/W1580166843","https://openalex.org/W1589223644","https://openalex.org/W1820949069","https://openalex.org/W1977662461","https://openalex.org/W2005314985","https://openalex.org/W2013277984","https://openalex.org/W2025981054","https://openalex.org/W2037232067","https://openalex.org/W2048715330","https://openalex.org/W2049202698","https://openalex.org/W2053573937","https://openalex.org/W2055939827","https://openalex.org/W2057552608","https://openalex.org/W2067481201","https://openalex.org/W2071578511","https://openalex.org/W2081102106","https://openalex.org/W2083125010","https://openalex.org/W2091135471","https://openalex.org/W2096527593","https://openalex.org/W2110788116","https://openalex.org/W2118269922","https://openalex.org/W2129233775","https://openalex.org/W2131620262","https://openalex.org/W2166087176","https://openalex.org/W3041834803","https://openalex.org/W3121343637","https://openalex.org/W6631393269","https://openalex.org/W6633499690","https://openalex.org/W6634544463","https://openalex.org/W6638436877","https://openalex.org/W6670589812","https://openalex.org/W6674855611","https://openalex.org/W6676664557","https://openalex.org/W6679274366"],"related_works":["https://openalex.org/W165215672","https://openalex.org/W119841348","https://openalex.org/W2267077731","https://openalex.org/W2171948294","https://openalex.org/W1510134535","https://openalex.org/W2386578196","https://openalex.org/W2483382562","https://openalex.org/W4312445213","https://openalex.org/W3091612633","https://openalex.org/W316061934"],"abstract_inverted_index":null,"counts_by_year":[{"year":2014,"cited_by_count":2}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}