{"id":"https://openalex.org/W2014423143","doi":"https://doi.org/10.1016/s0019-9958(74)91399-0","title":"Parallel context-free languages","display_name":"Parallel context-free languages","publication_year":1974,"publication_date":"1974-11-01","ids":{"openalex":"https://openalex.org/W2014423143","doi":"https://doi.org/10.1016/s0019-9958(74)91399-0","mag":"2014423143"},"language":"en","primary_location":{"id":"doi:10.1016/s0019-9958(74)91399-0","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0019-9958(74)91399-0","pdf_url":null,"source":{"id":"https://openalex.org/S4210192454","display_name":"Information and Control","issn_l":"0019-9958","issn":["0019-9958","1878-2981"],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/P4310319955","host_organization_name":"Academic Press","host_organization_lineage":["https://openalex.org/P4310319955","https://openalex.org/P4310320990"],"host_organization_lineage_names":["Academic Press","Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Information and Control","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/A5017408163","display_name":"Sven Skyum","orcid":null},"institutions":[{"id":"https://openalex.org/I204337017","display_name":"Aarhus University","ror":"https://ror.org/01aj84f44","country_code":"DK","type":"education","lineage":["https://openalex.org/I204337017"]}],"countries":["DK"],"is_corresponding":true,"raw_author_name":"Sven Skyum","raw_affiliation_strings":["Department of Computer Science, University of Aarhus, Denmark","Department of Computer Science University of Aarhus, Denmark"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science, University of Aarhus, Denmark","institution_ids":["https://openalex.org/I204337017"]},{"raw_affiliation_string":"Department of Computer Science University of Aarhus, Denmark","institution_ids":["https://openalex.org/I204337017"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5017408163"],"corresponding_institution_ids":["https://openalex.org/I204337017"],"apc_list":null,"apc_paid":null,"fwci":7.0404,"has_fulltext":false,"cited_by_count":28,"citation_normalized_percentile":{"value":0.97657531,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":null,"biblio":{"volume":"26","issue":"3","first_page":"280","last_page":"285"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/T11567","display_name":"semigroups and automata theory","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/T12029","display_name":"DNA and Biological Computing","score":0.9991000294685364,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11727","display_name":"Advanced Algebra and Logic","score":0.995199978351593,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/abstract-family-of-languages","display_name":"Abstract family of languages","score":0.6745001673698425},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.6662531495094299},{"id":"https://openalex.org/keywords/relation","display_name":"Relation (database)","score":0.6321812868118286},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5714280009269714},{"id":"https://openalex.org/keywords/language-family","display_name":"Language family","score":0.5159454941749573},{"id":"https://openalex.org/keywords/context-free-language","display_name":"Context-free language","score":0.4750226140022278},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.36881765723228455},{"id":"https://openalex.org/keywords/linguistics","display_name":"Linguistics","score":0.2543414235115051},{"id":"https://openalex.org/keywords/second-generation-programming-language","display_name":"Second-generation programming language","score":0.25070565938949585},{"id":"https://openalex.org/keywords/natural-language-processing","display_name":"Natural language processing","score":0.15711840987205505},{"id":"https://openalex.org/keywords/rule-based-machine-translation","display_name":"Rule-based machine translation","score":0.0936548113822937},{"id":"https://openalex.org/keywords/biology","display_name":"Biology","score":0.08646267652511597},{"id":"https://openalex.org/keywords/fifth-generation-programming-language","display_name":"Fifth-generation programming language","score":0.08051934838294983},{"id":"https://openalex.org/keywords/philosophy","display_name":"Philosophy","score":0.0588667094707489}],"concepts":[{"id":"https://openalex.org/C199163288","wikidata":"https://www.wikidata.org/wiki/Q3065587","display_name":"Abstract family of languages","level":5,"score":0.6745001673698425},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.6662531495094299},{"id":"https://openalex.org/C25343380","wikidata":"https://www.wikidata.org/wiki/Q277521","display_name":"Relation (database)","level":2,"score":0.6321812868118286},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5714280009269714},{"id":"https://openalex.org/C2780566098","wikidata":"https://www.wikidata.org/wiki/Q25295","display_name":"Language family","level":2,"score":0.5159454941749573},{"id":"https://openalex.org/C198838072","wikidata":"https://www.wikidata.org/wiki/Q729271","display_name":"Context-free language","level":3,"score":0.4750226140022278},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.36881765723228455},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.2543414235115051},{"id":"https://openalex.org/C11164408","wikidata":"https://www.wikidata.org/wiki/Q18657800","display_name":"Second-generation programming language","level":4,"score":0.25070565938949585},{"id":"https://openalex.org/C204321447","wikidata":"https://www.wikidata.org/wiki/Q30642","display_name":"Natural language processing","level":1,"score":0.15711840987205505},{"id":"https://openalex.org/C53893814","wikidata":"https://www.wikidata.org/wiki/Q7378909","display_name":"Rule-based machine translation","level":2,"score":0.0936548113822937},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.08646267652511597},{"id":"https://openalex.org/C199305712","wikidata":"https://www.wikidata.org/wiki/Q3205914","display_name":"Fifth-generation programming language","level":3,"score":0.08051934838294983},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0588667094707489},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C34165917","wikidata":"https://www.wikidata.org/wiki/Q188267","display_name":"Programming paradigm","level":2,"score":0.0},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1016/s0019-9958(74)91399-0","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0019-9958(74)91399-0","pdf_url":null,"source":{"id":"https://openalex.org/S4210192454","display_name":"Information and Control","issn_l":"0019-9958","issn":["0019-9958","1878-2981"],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/P4310319955","host_organization_name":"Academic Press","host_organization_lineage":["https://openalex.org/P4310319955","https://openalex.org/P4310320990"],"host_organization_lineage_names":["Academic Press","Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Information and Control","raw_type":"journal-article"},{"id":"pmh:oai:pure.atira.dk:publications/c5688578-d5d5-4426-9a91-5b3c5ccf6421","is_oa":false,"landing_page_url":"https://pure.au.dk/portal/en/publications/c5688578-d5d5-4426-9a91-5b3c5ccf6421","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Skyum, S 1974, 'Parallel context-free languages', Information and Control, vol. 26, no. 3, pp. 280-285. https://doi.org/10.1016/S0019-9958(74)91399-0","raw_type":"info:eu-repo/semantics/publishedVersion"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/4","display_name":"Quality Education","score":0.6499999761581421}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":6,"referenced_works":["https://openalex.org/W1975411323","https://openalex.org/W2073779224","https://openalex.org/W2142762730","https://openalex.org/W2914032487","https://openalex.org/W4285719527","https://openalex.org/W6680911966"],"related_works":["https://openalex.org/W3022516416","https://openalex.org/W3033525639","https://openalex.org/W2028740066","https://openalex.org/W276006532","https://openalex.org/W1969156644","https://openalex.org/W2050232471","https://openalex.org/W2119250974","https://openalex.org/W2014423143","https://openalex.org/W1697653112","https://openalex.org/W3106870970"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-03-10T14:07:55.174380","created_date":"2025-10-10T00:00:00"}