{"id":"https://openalex.org/W2161421551","doi":"https://doi.org/10.1016/s0306-4379(99)00033-2","title":"Typed query languages for databases containing queries","display_name":"Typed query languages for databases containing queries","publication_year":1999,"publication_date":"1999-11-01","ids":{"openalex":"https://openalex.org/W2161421551","doi":"https://doi.org/10.1016/s0306-4379(99)00033-2","mag":"2161421551"},"language":"en","primary_location":{"id":"doi:10.1016/s0306-4379(99)00033-2","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0306-4379(99)00033-2","pdf_url":null,"source":{"id":"https://openalex.org/S193006928","display_name":"Information Systems","issn_l":"0306-4379","issn":["0306-4379","1873-6076"],"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":"Information Systems","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"http://hdl.handle.net/1942/686","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5022264843","display_name":"Frank Neven","orcid":"https://orcid.org/0000-0002-7143-1903"},"institutions":[{"id":"https://openalex.org/I4210127597","display_name":"Transnational University Limburg","ror":"https://ror.org/02xyaf767","country_code":"BE","type":"education","lineage":["https://openalex.org/I4210127597"]}],"countries":["BE"],"is_corresponding":true,"raw_author_name":"Frank Neven","raw_affiliation_strings":["Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium"],"affiliations":[{"raw_affiliation_string":"Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium","institution_ids":["https://openalex.org/I4210127597"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5089823917","display_name":"Jan Van den Bussche","orcid":"https://orcid.org/0000-0003-0072-3252"},"institutions":[{"id":"https://openalex.org/I4210127597","display_name":"Transnational University Limburg","ror":"https://ror.org/02xyaf767","country_code":"BE","type":"education","lineage":["https://openalex.org/I4210127597"]}],"countries":["BE"],"is_corresponding":false,"raw_author_name":"Jan Van den Bussche","raw_affiliation_strings":["Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium"],"affiliations":[{"raw_affiliation_string":"Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium","institution_ids":["https://openalex.org/I4210127597"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5110598353","display_name":"Dirk Van Gucht","orcid":null},"institutions":[{"id":"https://openalex.org/I4210119109","display_name":"Indiana University Bloomington","ror":"https://ror.org/02k40bc56","country_code":"US","type":"education","lineage":["https://openalex.org/I4210119109","https://openalex.org/I592451"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Dirk Van Gucht","raw_affiliation_strings":["Indiana University, Computer Science Department, Lindley Hall 401B, Bloomington, IN 47408, USA"],"affiliations":[{"raw_affiliation_string":"Indiana University, Computer Science Department, Lindley Hall 401B, Bloomington, IN 47408, USA","institution_ids":["https://openalex.org/I4210119109"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5083197733","display_name":"Gottfried Vossen","orcid":null},"institutions":[{"id":"https://openalex.org/I22465464","display_name":"University of M\u00fcnster","ror":"https://ror.org/00pd74e08","country_code":"DE","type":"education","lineage":["https://openalex.org/I22465464"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Gottfried Vossen","raw_affiliation_strings":["Institut f\u00fcr Informatik, Universit\u00e4t M\u00fcnster, Steinfurter Stra\u03b2e 109, D-48161 M\u00fcnster, Germany"],"affiliations":[{"raw_affiliation_string":"Institut f\u00fcr Informatik, Universit\u00e4t M\u00fcnster, Steinfurter Stra\u03b2e 109, D-48161 M\u00fcnster, Germany","institution_ids":["https://openalex.org/I22465464"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5022264843"],"corresponding_institution_ids":["https://openalex.org/I4210127597"],"apc_list":{"value":2970,"currency":"USD","value_usd":2970},"apc_paid":null,"fwci":0.8066,"has_fulltext":false,"cited_by_count":12,"citation_normalized_percentile":{"value":0.81373727,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":96},"biblio":{"volume":"24","issue":"7","first_page":"569","last_page":"595"},"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/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.9983000159263611,"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/T10772","display_name":"Distributed systems and fault tolerance","score":0.9962999820709229,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/relational-algebra","display_name":"Relational algebra","score":0.7734213471412659},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7580012083053589},{"id":"https://openalex.org/keywords/relational-database","display_name":"Relational database","score":0.6884980797767639},{"id":"https://openalex.org/keywords/relational-calculus","display_name":"Relational calculus","score":0.6684591770172119},{"id":"https://openalex.org/keywords/conjunctive-query","display_name":"Conjunctive query","score":0.6243234872817993},{"id":"https://openalex.org/keywords/relational-model","display_name":"Relational model","score":0.5730690360069275},{"id":"https://openalex.org/keywords/codds-theorem","display_name":"Codd's theorem","score":0.5471171736717224},{"id":"https://openalex.org/keywords/equivalence","display_name":"Equivalence (formal languages)","score":0.5202456712722778},{"id":"https://openalex.org/keywords/database","display_name":"Database","score":0.5184035301208496},{"id":"https://openalex.org/keywords/database-theory","display_name":"Database theory","score":0.5021822452545166},{"id":"https://openalex.org/keywords/formalism","display_name":"Formalism (music)","score":0.4806203246116638},{"id":"https://openalex.org/keywords/database-design","display_name":"Database design","score":0.4796050786972046},{"id":"https://openalex.org/keywords/query-language","display_name":"Query language","score":0.473294198513031},{"id":"https://openalex.org/keywords/relational-database-management-system","display_name":"Relational database management system","score":0.4349524974822998},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.41615235805511475},{"id":"https://openalex.org/keywords/relation-algebra","display_name":"Relation algebra","score":0.4107491374015808},{"id":"https://openalex.org/keywords/algebra-over-a-field","display_name":"Algebra over a field","score":0.31795424222946167},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.14575150609016418},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.08889377117156982},{"id":"https://openalex.org/keywords/algebra-representation","display_name":"Algebra representation","score":0.08602023124694824},{"id":"https://openalex.org/keywords/two-element-boolean-algebra","display_name":"Two-element Boolean algebra","score":0.08572837710380554}],"concepts":[{"id":"https://openalex.org/C95916125","wikidata":"https://www.wikidata.org/wiki/Q840540","display_name":"Relational algebra","level":3,"score":0.7734213471412659},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7580012083053589},{"id":"https://openalex.org/C5655090","wikidata":"https://www.wikidata.org/wiki/Q192588","display_name":"Relational database","level":2,"score":0.6884980797767639},{"id":"https://openalex.org/C99436015","wikidata":"https://www.wikidata.org/wiki/Q1722436","display_name":"Relational calculus","level":4,"score":0.6684591770172119},{"id":"https://openalex.org/C65647387","wikidata":"https://www.wikidata.org/wiki/Q1781706","display_name":"Conjunctive query","level":3,"score":0.6243234872817993},{"id":"https://openalex.org/C40207289","wikidata":"https://www.wikidata.org/wiki/Q755662","display_name":"Relational model","level":3,"score":0.5730690360069275},{"id":"https://openalex.org/C16739119","wikidata":"https://www.wikidata.org/wiki/Q5139948","display_name":"Codd's theorem","level":5,"score":0.5471171736717224},{"id":"https://openalex.org/C2780069185","wikidata":"https://www.wikidata.org/wiki/Q7977945","display_name":"Equivalence (formal languages)","level":2,"score":0.5202456712722778},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.5184035301208496},{"id":"https://openalex.org/C12439846","wikidata":"https://www.wikidata.org/wiki/Q4809258","display_name":"Database theory","level":3,"score":0.5021822452545166},{"id":"https://openalex.org/C73301696","wikidata":"https://www.wikidata.org/wiki/Q5469984","display_name":"Formalism (music)","level":3,"score":0.4806203246116638},{"id":"https://openalex.org/C148840519","wikidata":"https://www.wikidata.org/wiki/Q1049878","display_name":"Database design","level":2,"score":0.4796050786972046},{"id":"https://openalex.org/C192028432","wikidata":"https://www.wikidata.org/wiki/Q845739","display_name":"Query language","level":2,"score":0.473294198513031},{"id":"https://openalex.org/C24394798","wikidata":"https://www.wikidata.org/wiki/Q192588","display_name":"Relational database management system","level":3,"score":0.4349524974822998},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.41615235805511475},{"id":"https://openalex.org/C10282146","wikidata":"https://www.wikidata.org/wiki/Q5965969","display_name":"Relation algebra","level":5,"score":0.4107491374015808},{"id":"https://openalex.org/C136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","level":2,"score":0.31795424222946167},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.14575150609016418},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.08889377117156982},{"id":"https://openalex.org/C14394260","wikidata":"https://www.wikidata.org/wiki/Q4723980","display_name":"Algebra representation","level":3,"score":0.08602023124694824},{"id":"https://openalex.org/C207764348","wikidata":"https://www.wikidata.org/wiki/Q7858706","display_name":"Two-element Boolean algebra","level":4,"score":0.08572837710380554},{"id":"https://openalex.org/C153349607","wikidata":"https://www.wikidata.org/wiki/Q36649","display_name":"Visual arts","level":1,"score":0.0},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.0},{"id":"https://openalex.org/C142362112","wikidata":"https://www.wikidata.org/wiki/Q735","display_name":"Art","level":0,"score":0.0},{"id":"https://openalex.org/C558565934","wikidata":"https://www.wikidata.org/wiki/Q2743","display_name":"Musical","level":2,"score":0.0}],"mesh":[],"locations_count":5,"locations":[{"id":"doi:10.1016/s0306-4379(99)00033-2","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0306-4379(99)00033-2","pdf_url":null,"source":{"id":"https://openalex.org/S193006928","display_name":"Information Systems","issn_l":"0306-4379","issn":["0306-4379","1873-6076"],"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":"Information Systems","raw_type":"journal-article"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.1.9063","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1.9063","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://alpha.luc.ac.be/%7Elucp1080/typed_meta.ps.gz","raw_type":"text"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.307.3073","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.307.3073","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://alpha.uhasselt.be/~lucp1080/typed_meta.pdf","raw_type":"text"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.44.9339","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.44.9339","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.luc.ac.be/~fneven/meta.ps.gz","raw_type":"text"},{"id":"pmh:oai:documentserver.uhasselt.be:1942/686","is_oa":true,"landing_page_url":"http://hdl.handle.net/1942/686","pdf_url":null,"source":{"id":"https://openalex.org/S4306401926","display_name":"Document Server@UHasselt (UHasselt)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I878454856","host_organization_name":"Hasselt University","host_organization_lineage":["https://openalex.org/I878454856"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"pmh:oai:documentserver.uhasselt.be:1942/686","is_oa":true,"landing_page_url":"http://hdl.handle.net/1942/686","pdf_url":null,"source":{"id":"https://openalex.org/S4306401926","display_name":"Document Server@UHasselt (UHasselt)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I878454856","host_organization_name":"Hasselt University","host_organization_lineage":["https://openalex.org/I878454856"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":36,"referenced_works":["https://openalex.org/W103987992","https://openalex.org/W1524668325","https://openalex.org/W1558832481","https://openalex.org/W1580024578","https://openalex.org/W1979966822","https://openalex.org/W1984890936","https://openalex.org/W1986832527","https://openalex.org/W2004943427","https://openalex.org/W2005835473","https://openalex.org/W2025969711","https://openalex.org/W2051045896","https://openalex.org/W2057491878","https://openalex.org/W2065419751","https://openalex.org/W2083001584","https://openalex.org/W2089674328","https://openalex.org/W2095263945","https://openalex.org/W2097344379","https://openalex.org/W2100220081","https://openalex.org/W2105505307","https://openalex.org/W2131300191","https://openalex.org/W2143332976","https://openalex.org/W2161609549","https://openalex.org/W2162621793","https://openalex.org/W2313175711","https://openalex.org/W2334137773","https://openalex.org/W2579709878","https://openalex.org/W2912959941","https://openalex.org/W2996599412","https://openalex.org/W4302070056","https://openalex.org/W6604247644","https://openalex.org/W6631393269","https://openalex.org/W6634801576","https://openalex.org/W6663335641","https://openalex.org/W6674594779","https://openalex.org/W6679287224","https://openalex.org/W6732300132"],"related_works":["https://openalex.org/W2089781037","https://openalex.org/W2005835473","https://openalex.org/W2085988990","https://openalex.org/W60748262","https://openalex.org/W1525937901","https://openalex.org/W2117881132","https://openalex.org/W1665257821","https://openalex.org/W2109256108","https://openalex.org/W2161421551","https://openalex.org/W1482832319"],"abstract_inverted_index":null,"counts_by_year":[{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2012,"cited_by_count":2}],"updated_date":"2026-04-05T17:49:38.594831","created_date":"2025-10-10T00:00:00"}
