{"id":"https://openalex.org/W2106533844","doi":"https://doi.org/10.1109/tkde.2002.1033777","title":"An evaluation of vertical class partitioning for query processing in object-oriented databases","display_name":"An evaluation of vertical class partitioning for query processing in object-oriented databases","publication_year":2002,"publication_date":"2002-09-01","ids":{"openalex":"https://openalex.org/W2106533844","doi":"https://doi.org/10.1109/tkde.2002.1033777","mag":"2106533844"},"language":"en","primary_location":{"id":"doi:10.1109/tkde.2002.1033777","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tkde.2002.1033777","pdf_url":null,"source":{"id":"https://openalex.org/S30698027","display_name":"IEEE Transactions on Knowledge and Data Engineering","issn_l":"1041-4347","issn":["1041-4347","1558-2191","2326-3865"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320439","host_organization_name":"IEEE Computer Society","host_organization_lineage":["https://openalex.org/P4310320439","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Computer Society","Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Knowledge and Data 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/A5103344848","display_name":"Chi-wai Fung","orcid":null},"institutions":[{"id":"https://openalex.org/I16518940","display_name":"Hong Kong Institute of Vocational Education","ror":"https://ror.org/01dmaez27","country_code":"CN","type":"education","lineage":["https://openalex.org/I16518940"]},{"id":"https://openalex.org/I144743875","display_name":"Vocational Training Council","ror":"https://ror.org/02pvbz391","country_code":"HK","type":"government","lineage":["https://openalex.org/I144743875"]}],"countries":["CN","HK"],"is_corresponding":true,"raw_author_name":"Chi-wai Fung","raw_affiliation_strings":["Department of Information, Vocational Training Council,Communications Technology, Hong Kong Institute of Vocational Education, Tuen Mun, Hong Kong, China","Dept. of Inf. & Commun. Technol., Hong Kong Inst. of Vocational Educ., Tuen Mun, China"],"affiliations":[{"raw_affiliation_string":"Department of Information, Vocational Training Council,Communications Technology, Hong Kong Institute of Vocational Education, Tuen Mun, Hong Kong, China","institution_ids":["https://openalex.org/I144743875","https://openalex.org/I16518940"]},{"raw_affiliation_string":"Dept. of Inf. & Commun. Technol., Hong Kong Inst. of Vocational Educ., Tuen Mun, China","institution_ids":["https://openalex.org/I16518940"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5088255710","display_name":"Kamalakar Karlapalem","orcid":"https://orcid.org/0000-0003-2528-7979"},"institutions":[{"id":"https://openalex.org/I64189192","display_name":"International Institute of Information Technology, Hyderabad","ror":"https://ror.org/05f11g639","country_code":"IN","type":"education","lineage":["https://openalex.org/I64189192"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"K. Karlapalem","raw_affiliation_strings":["International Institute of Information Technology, Hyderabad, India","International Institute of Information Technology,Hyderabad"],"affiliations":[{"raw_affiliation_string":"International Institute of Information Technology, Hyderabad, India","institution_ids":["https://openalex.org/I64189192"]},{"raw_affiliation_string":"International Institute of Information Technology,Hyderabad","institution_ids":["https://openalex.org/I64189192"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100404176","display_name":"Qing Li","orcid":"https://orcid.org/0000-0003-3370-471X"},"institutions":[{"id":"https://openalex.org/I168719708","display_name":"City University of Hong Kong","ror":"https://ror.org/03q8dnn23","country_code":"HK","type":"education","lineage":["https://openalex.org/I168719708"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"Qing Li","raw_affiliation_strings":["Department of Computer Engineering, Information Technology, City University of Hong Kong, Hong Kong, China","City University of Hong Kong"],"affiliations":[{"raw_affiliation_string":"Department of Computer Engineering, Information Technology, City University of Hong Kong, Hong Kong, China","institution_ids":["https://openalex.org/I168719708"]},{"raw_affiliation_string":"City University of Hong Kong","institution_ids":["https://openalex.org/I168719708"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5103344848"],"corresponding_institution_ids":["https://openalex.org/I144743875","https://openalex.org/I16518940"],"apc_list":null,"apc_paid":null,"fwci":0.4619,"has_fulltext":false,"cited_by_count":19,"citation_normalized_percentile":{"value":0.67990192,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"14","issue":"5","first_page":"1095","last_page":"1118"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":0.9998000264167786,"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":0.9998000264167786,"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/T11106","display_name":"Data Management and Algorithms","score":0.9976000189781189,"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/T10742","display_name":"Peer-to-Peer Network Technologies","score":0.984000027179718,"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/computer-science","display_name":"Computer science","score":0.841116189956665},{"id":"https://openalex.org/keywords/class-hierarchy","display_name":"Class hierarchy","score":0.7296428084373474},{"id":"https://openalex.org/keywords/class","display_name":"Class (philosophy)","score":0.6098348498344421},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.5771329998970032},{"id":"https://openalex.org/keywords/database","display_name":"Database","score":0.5485178232192993},{"id":"https://openalex.org/keywords/hierarchy","display_name":"Hierarchy","score":0.5314793586730957},{"id":"https://openalex.org/keywords/projection","display_name":"Projection (relational algebra)","score":0.5070521831512451},{"id":"https://openalex.org/keywords/object","display_name":"Object (grammar)","score":0.45036813616752625},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.3787442743778229},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3700217604637146},{"id":"https://openalex.org/keywords/parallel-computing","display_name":"Parallel computing","score":0.334212064743042},{"id":"https://openalex.org/keywords/object-oriented-programming","display_name":"Object-oriented programming","score":0.31420978903770447},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.23855680227279663},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.22941482067108154},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.1409423053264618}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.841116189956665},{"id":"https://openalex.org/C2781289151","wikidata":"https://www.wikidata.org/wiki/Q2903989","display_name":"Class hierarchy","level":3,"score":0.7296428084373474},{"id":"https://openalex.org/C2777212361","wikidata":"https://www.wikidata.org/wiki/Q5127848","display_name":"Class (philosophy)","level":2,"score":0.6098348498344421},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.5771329998970032},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.5485178232192993},{"id":"https://openalex.org/C31170391","wikidata":"https://www.wikidata.org/wiki/Q188619","display_name":"Hierarchy","level":2,"score":0.5314793586730957},{"id":"https://openalex.org/C57493831","wikidata":"https://www.wikidata.org/wiki/Q3134666","display_name":"Projection (relational algebra)","level":2,"score":0.5070521831512451},{"id":"https://openalex.org/C2781238097","wikidata":"https://www.wikidata.org/wiki/Q175026","display_name":"Object (grammar)","level":2,"score":0.45036813616752625},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.3787442743778229},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3700217604637146},{"id":"https://openalex.org/C173608175","wikidata":"https://www.wikidata.org/wiki/Q232661","display_name":"Parallel computing","level":1,"score":0.334212064743042},{"id":"https://openalex.org/C73752529","wikidata":"https://www.wikidata.org/wiki/Q79872","display_name":"Object-oriented programming","level":2,"score":0.31420978903770447},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.23855680227279663},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.22941482067108154},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.1409423053264618},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C34447519","wikidata":"https://www.wikidata.org/wiki/Q179522","display_name":"Market economy","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/tkde.2002.1033777","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tkde.2002.1033777","pdf_url":null,"source":{"id":"https://openalex.org/S30698027","display_name":"IEEE Transactions on Knowledge and Data Engineering","issn_l":"1041-4347","issn":["1041-4347","1558-2191","2326-3865"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320439","host_organization_name":"IEEE Computer Society","host_organization_lineage":["https://openalex.org/P4310320439","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Computer Society","Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Knowledge and Data Engineering","raw_type":"journal-article"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.21.2276","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.21.2276","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.cs.cityu.edu.hk/~csqli/publish/papers/TKDE00.pdf","raw_type":"text"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320320431","display_name":"Australian National University","ror":"https://ror.org/019wvm592"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":19,"referenced_works":["https://openalex.org/W1497281417","https://openalex.org/W1506006591","https://openalex.org/W1551753455","https://openalex.org/W1590873327","https://openalex.org/W1666249275","https://openalex.org/W2000568787","https://openalex.org/W2013255770","https://openalex.org/W2039795745","https://openalex.org/W2055468282","https://openalex.org/W2083151998","https://openalex.org/W2117300033","https://openalex.org/W2123746648","https://openalex.org/W2155166680","https://openalex.org/W2161105255","https://openalex.org/W2161694911","https://openalex.org/W2259276884","https://openalex.org/W4285719527","https://openalex.org/W6629647435","https://openalex.org/W6630407906"],"related_works":["https://openalex.org/W2079027950","https://openalex.org/W2357813254","https://openalex.org/W1971029554","https://openalex.org/W2187503956","https://openalex.org/W4388185001","https://openalex.org/W2895480205","https://openalex.org/W2133103371","https://openalex.org/W2051901529","https://openalex.org/W4229654425","https://openalex.org/W1999862073"],"abstract_inverted_index":{"Vertical":[0],"partitioning":[1,64,74,138],"is":[2,30,104],"a":[3,15,84,143],"design":[4],"technique":[5],"for":[6,89],"reducing":[7],"the":[8,22,34,58,66,70,108,116,119],"number":[9,23],"of":[10,18,24,45,62,65,72,91,100,110],"disk":[11],"accesses":[12],"to":[13,50,106,114,148],"execute":[14],"given":[16],"set":[17,99],"queries":[19,92],"by":[20,32],"minimizing":[21],"irrelevant":[25],"instance":[26,37],"variables":[27,38],"accessed.":[28],"This":[29],"accomplished":[31],"grouping":[33],"frequently":[35],"accessed":[36],"as":[39],"vertical":[40,63,73,111,136],"class":[41,54,137],"fragments.":[42],"The":[43],"complexity":[44],"object-oriented":[46],"database":[47],"models":[48],"due":[49],"subclass":[51],"hierarchy":[52,56],"and":[53,60,113],"composition":[55],"complicates":[57],"definition":[59],"representation":[61],"classes,":[67],"which":[68],"makes":[69],"problem":[71],"in":[75],"OODBs":[76],"very":[77],"challenging.":[78],"In":[79],"this":[80],"paper,":[81],"we":[82],"develop":[83],"comprehensive":[85],"analytical":[86,101,151],"cost":[87,152],"model":[88],"processing":[90],"on":[93,142],"vertically":[94],"partitioned":[95],"OODB":[96,145],"classes.":[97],"A":[98],"evaluation":[102],"results":[103],"presented":[105],"show":[107],"effect":[109],"partitioning,":[112],"study":[115],"trade-off":[117],"between":[118],"projection":[120],"ratio":[121],"versus":[122,127],"selectivity":[123],"factor":[124],"vis-a-vis":[125],"sequential":[126],"index":[128],"access.":[129],"Furthermore,":[130],"an":[131],"empirical":[132],"experimental":[133],"prototype":[134],"supporting":[135],"has":[139],"been":[140],"implemented":[141],"commercial":[144],"tool":[146],"kit":[147],"validate":[149],"our":[150],"model.":[153]},"counts_by_year":[{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2012,"cited_by_count":6}],"updated_date":"2026-04-05T17:49:38.594831","created_date":"2025-10-10T00:00:00"}
