{"id":"https://openalex.org/W2293246268","doi":"https://doi.org/10.1017/s0269888915000107","title":"Federated query processing on linked data: a qualitative survey and open challenges","display_name":"Federated query processing on linked data: a qualitative survey and open challenges","publication_year":2015,"publication_date":"2015-10-30","ids":{"openalex":"https://openalex.org/W2293246268","doi":"https://doi.org/10.1017/s0269888915000107","mag":"2293246268"},"language":"en","primary_location":{"id":"doi:10.1017/s0269888915000107","is_oa":false,"landing_page_url":"https://doi.org/10.1017/s0269888915000107","pdf_url":null,"source":{"id":"https://openalex.org/S137506714","display_name":"The Knowledge Engineering Review","issn_l":"0269-8889","issn":["0269-8889","1469-8005"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310311721","host_organization_name":"Cambridge University Press","host_organization_lineage":["https://openalex.org/P4310311721","https://openalex.org/P4310311702"],"host_organization_lineage_names":["Cambridge University Press","University of Cambridge"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Knowledge Engineering Review","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":null,"any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5055591071","display_name":"Damla O\u011fuz","orcid":"https://orcid.org/0000-0001-6556-7444"},"institutions":[{"id":"https://openalex.org/I120217413","display_name":"Izmir Institute of Technology","ror":"https://ror.org/03stptj97","country_code":"TR","type":"education","lineage":["https://openalex.org/I120217413"]},{"id":"https://openalex.org/I134560555","display_name":"Universit\u00e9 Toulouse III - Paul Sabatier","ror":"https://ror.org/02v6kpv12","country_code":"FR","type":"education","lineage":["https://openalex.org/I134560555"]},{"id":"https://openalex.org/I41641357","display_name":"Ege University","ror":"https://ror.org/02eaafc18","country_code":"TR","type":"education","lineage":["https://openalex.org/I41641357"]},{"id":"https://openalex.org/I4210119061","display_name":"Institut de Recherche en Informatique de Toulouse","ror":"https://ror.org/01rx4qw44","country_code":"FR","type":"facility","lineage":["https://openalex.org/I1294671590","https://openalex.org/I205747304","https://openalex.org/I205747304","https://openalex.org/I4210119061","https://openalex.org/I4210152422","https://openalex.org/I4387153255","https://openalex.org/I4405258862","https://openalex.org/I4405259414"]}],"countries":["FR","TR"],"is_corresponding":true,"raw_author_name":"Damla Oguz","raw_affiliation_strings":["Department of Computer Engineering, Ege University, 35100 Izmir, Turkey e-mail:","Department of Computer Engineering, Izmir Institute of Technology, 35430 Izmir, Turkey e-mail:","IRIT Laboratory, Paul Sabatier University, 31062 Toulouse, France e-mail:","Optimisation Dynamique de Requ\u00eates R\u00e9parties \u00e0 grande \u00e9chelle","Ege University - EGE (Izmir, Turkey)","Izmir Institute of Technology"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Engineering, Ege University, 35100 Izmir, Turkey e-mail:","institution_ids":["https://openalex.org/I41641357"]},{"raw_affiliation_string":"Department of Computer Engineering, Izmir Institute of Technology, 35430 Izmir, Turkey e-mail:","institution_ids":["https://openalex.org/I120217413"]},{"raw_affiliation_string":"IRIT Laboratory, Paul Sabatier University, 31062 Toulouse, France e-mail:","institution_ids":["https://openalex.org/I134560555","https://openalex.org/I4210119061"]},{"raw_affiliation_string":"Optimisation Dynamique de Requ\u00eates R\u00e9parties \u00e0 grande \u00e9chelle","institution_ids":[]},{"raw_affiliation_string":"Ege University - EGE (Izmir, Turkey)","institution_ids":["https://openalex.org/I41641357"]},{"raw_affiliation_string":"Izmir Institute of Technology","institution_ids":["https://openalex.org/I120217413"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5030801264","display_name":"Belgin Ergen\u00e7","orcid":null},"institutions":[{"id":"https://openalex.org/I120217413","display_name":"Izmir Institute of Technology","ror":"https://ror.org/03stptj97","country_code":"TR","type":"education","lineage":["https://openalex.org/I120217413"]}],"countries":["TR"],"is_corresponding":false,"raw_author_name":"Belgin Ergenc","raw_affiliation_strings":["Department of Computer Engineering, Izmir Institute of Technology, 35430 Izmir, Turkey e-mail:","Izmir Institute of Technology"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Engineering, Izmir Institute of Technology, 35430 Izmir, Turkey e-mail:","institution_ids":["https://openalex.org/I120217413"]},{"raw_affiliation_string":"Izmir Institute of Technology","institution_ids":["https://openalex.org/I120217413"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5112876800","display_name":"Shaoyi Yin","orcid":"https://orcid.org/0000-0002-5335-2443"},"institutions":[{"id":"https://openalex.org/I134560555","display_name":"Universit\u00e9 Toulouse III - Paul Sabatier","ror":"https://ror.org/02v6kpv12","country_code":"FR","type":"education","lineage":["https://openalex.org/I134560555"]},{"id":"https://openalex.org/I4210119061","display_name":"Institut de Recherche en Informatique de Toulouse","ror":"https://ror.org/01rx4qw44","country_code":"FR","type":"facility","lineage":["https://openalex.org/I1294671590","https://openalex.org/I205747304","https://openalex.org/I205747304","https://openalex.org/I4210119061","https://openalex.org/I4210152422","https://openalex.org/I4387153255","https://openalex.org/I4405258862","https://openalex.org/I4405259414"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Shaoyi Yin","raw_affiliation_strings":["IRIT Laboratory, Paul Sabatier University, 31062 Toulouse, France e-mail:","Optimisation Dynamique de Requ\u00eates R\u00e9parties \u00e0 grande \u00e9chelle"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"IRIT Laboratory, Paul Sabatier University, 31062 Toulouse, France e-mail:","institution_ids":["https://openalex.org/I134560555","https://openalex.org/I4210119061"]},{"raw_affiliation_string":"Optimisation Dynamique de Requ\u00eates R\u00e9parties \u00e0 grande \u00e9chelle","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5072644651","display_name":"O\u011fuz Dikenelli","orcid":"https://orcid.org/0000-0001-6982-9288"},"institutions":[{"id":"https://openalex.org/I41641357","display_name":"Ege University","ror":"https://ror.org/02eaafc18","country_code":"TR","type":"education","lineage":["https://openalex.org/I41641357"]}],"countries":["TR"],"is_corresponding":false,"raw_author_name":"Oguz Dikenelli","raw_affiliation_strings":["Department of Computer Engineering, Ege University, 35100 Izmir, Turkey e-mail:","Ege University - EGE (Izmir, Turkey)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Engineering, Ege University, 35100 Izmir, Turkey e-mail:","institution_ids":["https://openalex.org/I41641357"]},{"raw_affiliation_string":"Ege University - EGE (Izmir, Turkey)","institution_ids":["https://openalex.org/I41641357"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5029477698","display_name":"Abdelkader Hameurlain","orcid":"https://orcid.org/0000-0002-7008-6108"},"institutions":[{"id":"https://openalex.org/I134560555","display_name":"Universit\u00e9 Toulouse III - Paul Sabatier","ror":"https://ror.org/02v6kpv12","country_code":"FR","type":"education","lineage":["https://openalex.org/I134560555"]},{"id":"https://openalex.org/I4210119061","display_name":"Institut de Recherche en Informatique de Toulouse","ror":"https://ror.org/01rx4qw44","country_code":"FR","type":"facility","lineage":["https://openalex.org/I1294671590","https://openalex.org/I205747304","https://openalex.org/I205747304","https://openalex.org/I4210119061","https://openalex.org/I4210152422","https://openalex.org/I4387153255","https://openalex.org/I4405258862","https://openalex.org/I4405259414"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Abdelkader Hameurlain","raw_affiliation_strings":["IRIT Laboratory, Paul Sabatier University, 31062 Toulouse, France e-mail:","Optimisation Dynamique de Requ\u00eates R\u00e9parties \u00e0 grande \u00e9chelle"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"IRIT Laboratory, Paul Sabatier University, 31062 Toulouse, France e-mail:","institution_ids":["https://openalex.org/I134560555","https://openalex.org/I4210119061"]},{"raw_affiliation_string":"Optimisation Dynamique de Requ\u00eates R\u00e9parties \u00e0 grande \u00e9chelle","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5055591071"],"corresponding_institution_ids":["https://openalex.org/I120217413","https://openalex.org/I134560555","https://openalex.org/I41641357","https://openalex.org/I4210119061"],"apc_list":null,"apc_paid":null,"fwci":3.5054,"has_fulltext":false,"cited_by_count":30,"citation_normalized_percentile":{"value":0.93548704,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":90,"max":98},"biblio":{"volume":"30","issue":"5","first_page":"545","last_page":"563"},"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/T11106","display_name":"Data Management and Algorithms","score":0.9991000294685364,"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/T10215","display_name":"Semantic Web and Ontologies","score":0.9988999962806702,"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/computer-science","display_name":"Computer science","score":0.8365888595581055},{"id":"https://openalex.org/keywords/query-optimization","display_name":"Query optimization","score":0.6926884651184082},{"id":"https://openalex.org/keywords/web-search-query","display_name":"Web search query","score":0.6801220178604126},{"id":"https://openalex.org/keywords/web-query-classification","display_name":"Web query classification","score":0.6356527805328369},{"id":"https://openalex.org/keywords/query-expansion","display_name":"Query expansion","score":0.5892502069473267},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.5747341513633728},{"id":"https://openalex.org/keywords/sargable","display_name":"Sargable","score":0.5298492908477783},{"id":"https://openalex.org/keywords/query-language","display_name":"Query language","score":0.4973619282245636},{"id":"https://openalex.org/keywords/rdf-query-language","display_name":"RDF query language","score":0.4877522587776184},{"id":"https://openalex.org/keywords/focus","display_name":"Focus (optics)","score":0.47376587986946106},{"id":"https://openalex.org/keywords/publication","display_name":"Publication","score":0.4669896960258484},{"id":"https://openalex.org/keywords/selection","display_name":"Selection (genetic algorithm)","score":0.4323844909667969},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.3718792498111725},{"id":"https://openalex.org/keywords/database","display_name":"Database","score":0.32427385449409485},{"id":"https://openalex.org/keywords/search-engine","display_name":"Search engine","score":0.2899262309074402}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8365888595581055},{"id":"https://openalex.org/C157692150","wikidata":"https://www.wikidata.org/wiki/Q2919848","display_name":"Query optimization","level":2,"score":0.6926884651184082},{"id":"https://openalex.org/C164120249","wikidata":"https://www.wikidata.org/wiki/Q995982","display_name":"Web search query","level":3,"score":0.6801220178604126},{"id":"https://openalex.org/C118689300","wikidata":"https://www.wikidata.org/wiki/Q7978614","display_name":"Web query classification","level":4,"score":0.6356527805328369},{"id":"https://openalex.org/C99016210","wikidata":"https://www.wikidata.org/wiki/Q5488129","display_name":"Query expansion","level":2,"score":0.5892502069473267},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.5747341513633728},{"id":"https://openalex.org/C192939062","wikidata":"https://www.wikidata.org/wiki/Q104840822","display_name":"Sargable","level":4,"score":0.5298492908477783},{"id":"https://openalex.org/C192028432","wikidata":"https://www.wikidata.org/wiki/Q845739","display_name":"Query language","level":2,"score":0.4973619282245636},{"id":"https://openalex.org/C96956885","wikidata":"https://www.wikidata.org/wiki/Q6138701","display_name":"RDF query language","level":5,"score":0.4877522587776184},{"id":"https://openalex.org/C192209626","wikidata":"https://www.wikidata.org/wiki/Q190909","display_name":"Focus (optics)","level":2,"score":0.47376587986946106},{"id":"https://openalex.org/C41458344","wikidata":"https://www.wikidata.org/wiki/Q732577","display_name":"Publication","level":2,"score":0.4669896960258484},{"id":"https://openalex.org/C81917197","wikidata":"https://www.wikidata.org/wiki/Q628760","display_name":"Selection (genetic algorithm)","level":2,"score":0.4323844909667969},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.3718792498111725},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.32427385449409485},{"id":"https://openalex.org/C97854310","wikidata":"https://www.wikidata.org/wiki/Q19541","display_name":"Search engine","level":2,"score":0.2899262309074402},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C144133560","wikidata":"https://www.wikidata.org/wiki/Q4830453","display_name":"Business","level":0,"score":0.0},{"id":"https://openalex.org/C112698675","wikidata":"https://www.wikidata.org/wiki/Q37038","display_name":"Advertising","level":1,"score":0.0},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.0}],"mesh":[],"locations_count":6,"locations":[{"id":"doi:10.1017/s0269888915000107","is_oa":false,"landing_page_url":"https://doi.org/10.1017/s0269888915000107","pdf_url":null,"source":{"id":"https://openalex.org/S137506714","display_name":"The Knowledge Engineering Review","issn_l":"0269-8889","issn":["0269-8889","1469-8005"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310311721","host_organization_name":"Cambridge University Press","host_organization_lineage":["https://openalex.org/P4310311721","https://openalex.org/P4310311702"],"host_organization_lineage_names":["Cambridge University Press","University of Cambridge"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Knowledge Engineering Review","raw_type":"journal-article"},{"id":"pmh:oai:oatao.univ-toulouse.fr:15213","is_oa":true,"landing_page_url":null,"pdf_url":null,"source":{"id":"https://openalex.org/S4306401987","display_name":"Open Archive Toulouse Archive Ouverte (University of Toulouse)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I17866349","host_organization_name":"Universit\u00e9 F\u00e9d\u00e9rale de Toulouse Midi-Pyr\u00e9n\u00e9es","host_organization_lineage":["https://openalex.org/I17866349"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"","raw_type":"Article"},{"id":"pmh:oai:HAL:hal-03464366v1","is_oa":true,"landing_page_url":"https://hal.science/hal-03464366","pdf_url":null,"source":{"id":"https://openalex.org/S4306402512","display_name":"HAL (Le Centre pour la Communication Scientifique Directe)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1294671590","host_organization_name":"Centre National de la Recherche Scientifique","host_organization_lineage":["https://openalex.org/I1294671590"],"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":"https://www.cambridge.org/core/journals/knowledge-engineering-review/article/abs/federated-query-processing-on-linked-data-a-qualitative-survey-and-open-challenges/80C13E597862D705B609BD8AFE4AB12B#","raw_type":"Journal articles"},{"id":"pmh:oai:gcris.iyte.edu.tr:11147/5488","is_oa":true,"landing_page_url":"https://hdl.handle.net/11147/5488","pdf_url":null,"source":{"id":"https://openalex.org/S4306400894","display_name":"\u0130YTE (\u0130ZM\u0130R Y\u00dcKSEK TEKNOLOJ\u0130 ENST\u0130T\u00dcS\u00dc)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I120217413","host_organization_name":"Izmir Institute of Technology","host_organization_lineage":["https://openalex.org/I120217413"],"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":null,"raw_type":"Article"},{"id":"pmh:oai:openaccess.iyte.edu.tr:11147/5488","is_oa":true,"landing_page_url":"http://hdl.handle.net/11147/5488","pdf_url":null,"source":{"id":"https://openalex.org/S4377196445","display_name":"IYTE GCRIS Database (Izmir Institute of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I120217413","host_organization_name":"Izmir Institute of Technology","host_organization_lineage":["https://openalex.org/I120217413"],"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/review"},{"id":"pmh:oai:openaccess.iyte.edu.tr:8080:11147/5488","is_oa":true,"landing_page_url":"http://doi.org/10.1017/S0269888915000107","pdf_url":null,"source":{"id":"https://openalex.org/S4306400894","display_name":"\u0130YTE (\u0130ZM\u0130R Y\u00dcKSEK TEKNOLOJ\u0130 ENST\u0130T\u00dcS\u00dc)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I120217413","host_organization_name":"Izmir Institute of Technology","host_organization_lineage":["https://openalex.org/I120217413"],"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":"review"}],"best_oa_location":{"id":"pmh:oai:oatao.univ-toulouse.fr:15213","is_oa":true,"landing_page_url":null,"pdf_url":null,"source":{"id":"https://openalex.org/S4306401987","display_name":"Open Archive Toulouse Archive Ouverte (University of Toulouse)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I17866349","host_organization_name":"Universit\u00e9 F\u00e9d\u00e9rale de Toulouse Midi-Pyr\u00e9n\u00e9es","host_organization_lineage":["https://openalex.org/I17866349"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"","raw_type":"Article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":69,"referenced_works":["https://openalex.org/W23327836","https://openalex.org/W116701979","https://openalex.org/W150801922","https://openalex.org/W153622350","https://openalex.org/W171170398","https://openalex.org/W173967235","https://openalex.org/W237995741","https://openalex.org/W641408302","https://openalex.org/W812314648","https://openalex.org/W1483744472","https://openalex.org/W1484056211","https://openalex.org/W1502629466","https://openalex.org/W1511014465","https://openalex.org/W1513761307","https://openalex.org/W1555486317","https://openalex.org/W1563265404","https://openalex.org/W1565760524","https://openalex.org/W1597561248","https://openalex.org/W1603341177","https://openalex.org/W1679455373","https://openalex.org/W1802580882","https://openalex.org/W1809515864","https://openalex.org/W1975731516","https://openalex.org/W1988320382","https://openalex.org/W2005199100","https://openalex.org/W2015191210","https://openalex.org/W2024270063","https://openalex.org/W2041563709","https://openalex.org/W2042408681","https://openalex.org/W2057982888","https://openalex.org/W2061044377","https://openalex.org/W2066623874","https://openalex.org/W2068606814","https://openalex.org/W2072001200","https://openalex.org/W2074013691","https://openalex.org/W2078708523","https://openalex.org/W2084761702","https://openalex.org/W2095590518","https://openalex.org/W2109149785","https://openalex.org/W2114833437","https://openalex.org/W2120415542","https://openalex.org/W2121755841","https://openalex.org/W2126422268","https://openalex.org/W2132612426","https://openalex.org/W2134876510","https://openalex.org/W2137151464","https://openalex.org/W2141824507","https://openalex.org/W2143452574","https://openalex.org/W2143713672","https://openalex.org/W2152395348","https://openalex.org/W2162777223","https://openalex.org/W2171147420","https://openalex.org/W2201552871","https://openalex.org/W2203361072","https://openalex.org/W2210169352","https://openalex.org/W2248646379","https://openalex.org/W2265585838","https://openalex.org/W2274744161","https://openalex.org/W2296027053","https://openalex.org/W2766000922","https://openalex.org/W4206606839","https://openalex.org/W4235350695","https://openalex.org/W4251246352","https://openalex.org/W4252265332","https://openalex.org/W6607048088","https://openalex.org/W6654155348","https://openalex.org/W6680052129","https://openalex.org/W6681234838","https://openalex.org/W6685264613"],"related_works":["https://openalex.org/W2096359267","https://openalex.org/W2572349046","https://openalex.org/W2392799717","https://openalex.org/W2146885082","https://openalex.org/W3125756434","https://openalex.org/W2026738364","https://openalex.org/W2017989738","https://openalex.org/W2124814993","https://openalex.org/W1952568433","https://openalex.org/W2367594159"],"abstract_inverted_index":{"Abstract":[0],"A":[1],"large":[2],"number":[3],"of":[4,22,37,75,86,94,98,104,110,119],"data":[5,12,23,27,66],"providers":[6],"publish":[7],"and":[8,45,48,62,71,89],"connect":[9],"their":[10],"structured":[11],"on":[13,51,55,65,123],"the":[14,20,95,102,107,116],"Web":[15,21],"as":[16],"linked":[17,56,124],"data.":[18,57,125],"Thus,":[19],"becomes":[24],"a":[25,60,83,91],"global":[26],"space.":[28],"In":[29],"this":[30,43],"paper,":[31],"we":[32,81,114],"initially":[33],"give":[34,90],"an":[35],"overview":[36],"query":[38,53,72,77,121],"processing":[39,54,122],"approaches":[40],"used":[41],"in":[42],"interlinked":[44],"distributed":[46],"environment,":[47],"then":[49],"focus":[50],"federated":[52,120],"We":[58],"provide":[59],"detailed":[61],"clear":[63],"insight":[64],"source":[67],"selection,":[68],"join":[69],"methods":[70,74],"optimization":[73],"existing":[76],"federation":[78],"engines.":[79],"Furthermore,":[80],"present":[82],"qualitative":[84],"comparison":[85,93],"these":[87],"engines":[88],"complementary":[92],"measured":[96],"metrics":[97],"each":[99,111],"engine":[100],"with":[101],"idea":[103],"pointing":[105],"out":[106],"major":[108,117],"strengths":[109],"one.":[112],"Finally,":[113],"discuss":[115],"challenges":[118]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":3},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":6},{"year":2019,"cited_by_count":4},{"year":2018,"cited_by_count":3},{"year":2017,"cited_by_count":3},{"year":2016,"cited_by_count":4},{"year":2012,"cited_by_count":1}],"updated_date":"2026-05-21T06:26:12.895304","created_date":"2025-10-10T00:00:00"}