{"id":"https://openalex.org/W2060300993","doi":"https://doi.org/10.1016/0022-0000(91)90018-z","title":"The string generating power of context-free hypergraph grammars","display_name":"The string generating power of context-free hypergraph grammars","publication_year":1991,"publication_date":"1991-10-01","ids":{"openalex":"https://openalex.org/W2060300993","doi":"https://doi.org/10.1016/0022-0000(91)90018-z","mag":"2060300993"},"language":"en","primary_location":{"id":"doi:10.1016/0022-0000(91)90018-z","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0022-0000(91)90018-z","pdf_url":null,"source":{"id":"https://openalex.org/S141020589","display_name":"Journal of Computer and System Sciences","issn_l":"0022-0000","issn":["0022-0000","1090-2724"],"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":"Journal of Computer and System Sciences","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/A5110094636","display_name":"Joost Engelfriet","orcid":null},"institutions":[{"id":"https://openalex.org/I121797337","display_name":"Leiden University","ror":"https://ror.org/027bh9e22","country_code":"NL","type":"education","lineage":["https://openalex.org/I121797337"]}],"countries":["NL"],"is_corresponding":false,"raw_author_name":"Joost Engelfriet","raw_affiliation_strings":["Department of Computer Science, Leiden University, PO Box 9512, 2300 RA Leiden, The Netherlands","Department of Computer Science, Leiden University, Leiden, The Netherlands#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Science, Leiden University, PO Box 9512, 2300 RA Leiden, The Netherlands","institution_ids":["https://openalex.org/I121797337"]},{"raw_affiliation_string":"Department of Computer Science, Leiden University, Leiden, The Netherlands#TAB#","institution_ids":["https://openalex.org/I121797337"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5031486225","display_name":"Linda Heyker","orcid":null},"institutions":[{"id":"https://openalex.org/I121797337","display_name":"Leiden University","ror":"https://ror.org/027bh9e22","country_code":"NL","type":"education","lineage":["https://openalex.org/I121797337"]}],"countries":["NL"],"is_corresponding":false,"raw_author_name":"Linda Heyker","raw_affiliation_strings":["Department of Computer Science, Leiden University, PO Box 9512, 2300 RA Leiden, The Netherlands","Department of Computer Science, Leiden University, Leiden, The Netherlands#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Science, Leiden University, PO Box 9512, 2300 RA Leiden, The Netherlands","institution_ids":["https://openalex.org/I121797337"]},{"raw_affiliation_string":"Department of Computer Science, Leiden University, Leiden, The Netherlands#TAB#","institution_ids":["https://openalex.org/I121797337"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I121797337"],"apc_list":{"value":2610,"currency":"USD","value_usd":2610},"apc_paid":null,"fwci":6.7921,"has_fulltext":false,"cited_by_count":57,"citation_normalized_percentile":{"value":0.96872815,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":97},"biblio":{"volume":"43","issue":"2","first_page":"328","last_page":"360"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11269","display_name":"Algorithms and Data Compression","score":0.9998000264167786,"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"}},"topics":[{"id":"https://openalex.org/T11269","display_name":"Algorithms and Data Compression","score":0.9998000264167786,"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/T12029","display_name":"DNA and Biological Computing","score":0.9987999796867371,"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/T11567","display_name":"semigroups and automata theory","score":0.9987000226974487,"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/tree-adjoining-grammar","display_name":"Tree-adjoining grammar","score":0.7641372084617615},{"id":"https://openalex.org/keywords/hypergraph","display_name":"Hypergraph","score":0.7551199197769165},{"id":"https://openalex.org/keywords/string","display_name":"String (physics)","score":0.6838598251342773},{"id":"https://openalex.org/keywords/context-sensitive-grammar","display_name":"Context-sensitive grammar","score":0.62824946641922},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5539233684539795},{"id":"https://openalex.org/keywords/deterministic-context-free-grammar","display_name":"Deterministic context-free grammar","score":0.5536290407180786},{"id":"https://openalex.org/keywords/context-free-grammar","display_name":"Context-free grammar","score":0.5192408561706543},{"id":"https://openalex.org/keywords/indexed-grammar","display_name":"Indexed grammar","score":0.5037972331047058},{"id":"https://openalex.org/keywords/rule-based-machine-translation","display_name":"Rule-based machine translation","score":0.488149493932724},{"id":"https://openalex.org/keywords/regular-tree-grammar","display_name":"Regular tree grammar","score":0.46065542101860046},{"id":"https://openalex.org/keywords/embedded-pushdown-automaton","display_name":"Embedded pushdown automaton","score":0.4140142798423767},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.4111132025718689},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3914218544960022},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3301767110824585},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.28386107087135315},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.20982539653778076},{"id":"https://openalex.org/keywords/mildly-context-sensitive-grammar-formalism","display_name":"Mildly context-sensitive grammar formalism","score":0.14758852124214172},{"id":"https://openalex.org/keywords/phrase-structure-rules","display_name":"Phrase structure rules","score":0.10485881567001343},{"id":"https://openalex.org/keywords/generative-grammar","display_name":"Generative grammar","score":0.09443774819374084}],"concepts":[{"id":"https://openalex.org/C134083981","wikidata":"https://www.wikidata.org/wiki/Q1754022","display_name":"Tree-adjoining grammar","level":4,"score":0.7641372084617615},{"id":"https://openalex.org/C2781221856","wikidata":"https://www.wikidata.org/wiki/Q840247","display_name":"Hypergraph","level":2,"score":0.7551199197769165},{"id":"https://openalex.org/C157486923","wikidata":"https://www.wikidata.org/wiki/Q1376436","display_name":"String (physics)","level":2,"score":0.6838598251342773},{"id":"https://openalex.org/C125950753","wikidata":"https://www.wikidata.org/wiki/Q908674","display_name":"Context-sensitive grammar","level":4,"score":0.62824946641922},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5539233684539795},{"id":"https://openalex.org/C177638518","wikidata":"https://www.wikidata.org/wiki/Q3435975","display_name":"Deterministic context-free grammar","level":5,"score":0.5536290407180786},{"id":"https://openalex.org/C97212296","wikidata":"https://www.wikidata.org/wiki/Q338047","display_name":"Context-free grammar","level":3,"score":0.5192408561706543},{"id":"https://openalex.org/C79243999","wikidata":"https://www.wikidata.org/wiki/Q6590011","display_name":"Indexed grammar","level":5,"score":0.5037972331047058},{"id":"https://openalex.org/C53893814","wikidata":"https://www.wikidata.org/wiki/Q7378909","display_name":"Rule-based machine translation","level":2,"score":0.488149493932724},{"id":"https://openalex.org/C57097763","wikidata":"https://www.wikidata.org/wiki/Q7309622","display_name":"Regular tree grammar","level":5,"score":0.46065542101860046},{"id":"https://openalex.org/C27034413","wikidata":"https://www.wikidata.org/wiki/Q5370010","display_name":"Embedded pushdown automaton","level":5,"score":0.4140142798423767},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.4111132025718689},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3914218544960022},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3301767110824585},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.28386107087135315},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.20982539653778076},{"id":"https://openalex.org/C172265290","wikidata":"https://www.wikidata.org/wiki/Q6134957","display_name":"Mildly context-sensitive grammar formalism","level":4,"score":0.14758852124214172},{"id":"https://openalex.org/C80877019","wikidata":"https://www.wikidata.org/wiki/Q7188074","display_name":"Phrase structure rules","level":3,"score":0.10485881567001343},{"id":"https://openalex.org/C39890363","wikidata":"https://www.wikidata.org/wiki/Q36108","display_name":"Generative grammar","level":2,"score":0.09443774819374084},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C37914503","wikidata":"https://www.wikidata.org/wiki/Q156495","display_name":"Mathematical physics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0022-0000(91)90018-z","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0022-0000(91)90018-z","pdf_url":null,"source":{"id":"https://openalex.org/S141020589","display_name":"Journal of Computer and System Sciences","issn_l":"0022-0000","issn":["0022-0000","1090-2724"],"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":"Journal of Computer and System Sciences","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":32,"referenced_works":["https://openalex.org/W3889443","https://openalex.org/W39728526","https://openalex.org/W152064238","https://openalex.org/W175409326","https://openalex.org/W1524358346","https://openalex.org/W1598694679","https://openalex.org/W1600820878","https://openalex.org/W1859552527","https://openalex.org/W1987709131","https://openalex.org/W1992040352","https://openalex.org/W2002089154","https://openalex.org/W2016113382","https://openalex.org/W2016758987","https://openalex.org/W2019449338","https://openalex.org/W2028357390","https://openalex.org/W2037692988","https://openalex.org/W2038925304","https://openalex.org/W2083312088","https://openalex.org/W2087945397","https://openalex.org/W2096529162","https://openalex.org/W2148246401","https://openalex.org/W2243887335","https://openalex.org/W2484474745","https://openalex.org/W3037477934","https://openalex.org/W4238812576","https://openalex.org/W4302339081","https://openalex.org/W6606175027","https://openalex.org/W6631446816","https://openalex.org/W6636026711","https://openalex.org/W6636171814","https://openalex.org/W6690821859","https://openalex.org/W6722240536"],"related_works":["https://openalex.org/W2019032507","https://openalex.org/W171824343","https://openalex.org/W1609763579","https://openalex.org/W24640121","https://openalex.org/W1524907688","https://openalex.org/W2067980891","https://openalex.org/W2403874525","https://openalex.org/W2002749975","https://openalex.org/W2041988689","https://openalex.org/W2068249429"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2021,"cited_by_count":2},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":2},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":2},{"year":2012,"cited_by_count":3}],"updated_date":"2026-08-21T09:56:20.448147","created_date":"2025-10-10T00:00:00"}
