{"id":"https://openalex.org/W1561760692","doi":"https://doi.org/10.1007/3-540-19074-0_59","title":"A universal relation model for nested relations","display_name":"A universal relation model for nested relations","publication_year":1988,"publication_date":"1988-01-01","ids":{"openalex":"https://openalex.org/W1561760692","doi":"https://doi.org/10.1007/3-540-19074-0_59","mag":"1561760692"},"language":"en","primary_location":{"id":"doi:10.1007/3-540-19074-0_59","is_oa":false,"landing_page_url":"https://doi.org/10.1007/3-540-19074-0_59","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/A5015725705","display_name":"Mark Levene","orcid":"https://orcid.org/0000-0001-8632-4732"},"institutions":[{"id":"https://openalex.org/I4210160447","display_name":"Universidad de Londres","ror":"https://ror.org/054v4yq51","country_code":"MX","type":"education","lineage":["https://openalex.org/I4210160447"]},{"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","MX"],"is_corresponding":false,"raw_author_name":"M. Levene","raw_affiliation_strings":["Department of Computer Science, Birkbeck College, University of London, London, UK","University of London"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Science, Birkbeck College, University of London, London, UK","institution_ids":["https://openalex.org/I98259816"]},{"raw_affiliation_string":"University of London","institution_ids":["https://openalex.org/I4210160447"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5024905226","display_name":"George Loizou","orcid":"https://orcid.org/0000-0002-9376-9243"},"institutions":[{"id":"https://openalex.org/I4210160447","display_name":"Universidad de Londres","ror":"https://ror.org/054v4yq51","country_code":"MX","type":"education","lineage":["https://openalex.org/I4210160447"]},{"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","MX"],"is_corresponding":false,"raw_author_name":"G. Loizou","raw_affiliation_strings":["Department of Computer Science, Birkbeck College, University of London, London, UK","University of London"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Science, Birkbeck College, University of London, London, UK","institution_ids":["https://openalex.org/I98259816"]},{"raw_affiliation_string":"University of London","institution_ids":["https://openalex.org/I4210160447"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":5000,"currency":"EUR","value_usd":5392},"apc_paid":null,"fwci":2.459,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.89254598,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"294","last_page":"308"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":0.9995999932289124,"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":0.9995999932289124,"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":0.998199999332428,"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/T11106","display_name":"Data Management and Algorithms","score":0.9972000122070312,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/relation","display_name":"Relation (database)","score":0.7260211706161499},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6057668924331665},{"id":"https://openalex.org/keywords/relational-database","display_name":"Relational database","score":0.5993331074714661},{"id":"https://openalex.org/keywords/relational-model","display_name":"Relational model","score":0.5772952437400818},{"id":"https://openalex.org/keywords/nested-set-model","display_name":"Nested set model","score":0.5695508122444153},{"id":"https://openalex.org/keywords/interface","display_name":"Interface (matter)","score":0.502805233001709},{"id":"https://openalex.org/keywords/connection","display_name":"Connection (principal bundle)","score":0.4934336245059967},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.4521321654319763},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2823069095611572},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.25201642513275146},{"id":"https://openalex.org/keywords/geometry","display_name":"Geometry","score":0.06460222601890564},{"id":"https://openalex.org/keywords/parallel-computing","display_name":"Parallel computing","score":0.055871814489364624}],"concepts":[{"id":"https://openalex.org/C25343380","wikidata":"https://www.wikidata.org/wiki/Q277521","display_name":"Relation (database)","level":2,"score":0.7260211706161499},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6057668924331665},{"id":"https://openalex.org/C5655090","wikidata":"https://www.wikidata.org/wiki/Q192588","display_name":"Relational database","level":2,"score":0.5993331074714661},{"id":"https://openalex.org/C40207289","wikidata":"https://www.wikidata.org/wiki/Q755662","display_name":"Relational model","level":3,"score":0.5772952437400818},{"id":"https://openalex.org/C103000020","wikidata":"https://www.wikidata.org/wiki/Q1978426","display_name":"Nested set model","level":3,"score":0.5695508122444153},{"id":"https://openalex.org/C113843644","wikidata":"https://www.wikidata.org/wiki/Q901882","display_name":"Interface (matter)","level":4,"score":0.502805233001709},{"id":"https://openalex.org/C13355873","wikidata":"https://www.wikidata.org/wiki/Q2920850","display_name":"Connection (principal bundle)","level":2,"score":0.4934336245059967},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.4521321654319763},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2823069095611572},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.25201642513275146},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.06460222601890564},{"id":"https://openalex.org/C173608175","wikidata":"https://www.wikidata.org/wiki/Q232661","display_name":"Parallel computing","level":1,"score":0.055871814489364624},{"id":"https://openalex.org/C157915830","wikidata":"https://www.wikidata.org/wiki/Q2928001","display_name":"Bubble","level":2,"score":0.0},{"id":"https://openalex.org/C129307140","wikidata":"https://www.wikidata.org/wiki/Q6795880","display_name":"Maximum bubble pressure method","level":3,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1007/3-540-19074-0_59","is_oa":false,"landing_page_url":"https://doi.org/10.1007/3-540-19074-0_59","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"},{"id":"pmh:oai:eprints.bbk.ac.uk.oai2:44746","is_oa":false,"landing_page_url":"https://eprints.bbk.ac.uk/id/eprint/44746/","pdf_url":null,"source":{"id":"https://openalex.org/S4306400466","display_name":"BIROn (Birkbeck, University of London)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I98259816","host_organization_name":"Birkbeck, University of London","host_organization_lineage":["https://openalex.org/I98259816"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Book Section"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/10","display_name":"Reduced inequalities","score":0.41999998688697815}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":40,"referenced_works":["https://openalex.org/W115732867","https://openalex.org/W135323631","https://openalex.org/W200320990","https://openalex.org/W619004858","https://openalex.org/W1513180337","https://openalex.org/W1529405776","https://openalex.org/W1969013263","https://openalex.org/W1970503136","https://openalex.org/W1971475250","https://openalex.org/W1973125170","https://openalex.org/W1975057558","https://openalex.org/W1983428002","https://openalex.org/W1984149034","https://openalex.org/W1985581502","https://openalex.org/W1988120834","https://openalex.org/W1993132652","https://openalex.org/W1995734168","https://openalex.org/W2001665375","https://openalex.org/W2025583905","https://openalex.org/W2029819625","https://openalex.org/W2039610696","https://openalex.org/W2057852703","https://openalex.org/W2066837227","https://openalex.org/W2081053428","https://openalex.org/W2082395701","https://openalex.org/W2089677381","https://openalex.org/W2104498537","https://openalex.org/W2110810394","https://openalex.org/W2115822498","https://openalex.org/W2122789628","https://openalex.org/W2140136514","https://openalex.org/W2146899290","https://openalex.org/W2148417962","https://openalex.org/W2162715748","https://openalex.org/W2165343038","https://openalex.org/W2489748212","https://openalex.org/W4253682816","https://openalex.org/W6605531863","https://openalex.org/W6630650342","https://openalex.org/W6667211271"],"related_works":["https://openalex.org/W2267077731","https://openalex.org/W1966209153","https://openalex.org/W2386578196","https://openalex.org/W3091612633","https://openalex.org/W2483382562","https://openalex.org/W2085988990","https://openalex.org/W1510134535","https://openalex.org/W1841066643","https://openalex.org/W2171487662","https://openalex.org/W2800910233"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}
