Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2161160885', 'doi': 'https://doi.org/10.1016/0004-3702(80)90003-x', 'title': 'Definite clause grammars for language analysis—A survey of the formalism and a comparison with augmented transition networks', 'display_name': 'Definite clause grammars for language analysis—A survey of the formalism and a comparison with augmented transition networks', 'publication_year': 1980, 'publication_date': '1980-05-01', 'ids': {'openalex': 'https://openalex.org/W2161160885', 'doi': 'https://doi.org/10.1016/0004-3702(80)90003-x', 'mag': '2161160885'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1016/0004-3702(80)90003-x', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S196139623', 'display_name': 'Artificial Intelligence', 'issn_l': '0004-3702', 'issn': ['0004-3702', '1872-7921'], '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': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5103620421', 'display_name': 'Fernando C. N. Pereira', 'orcid': None}, 'institutions': [], 'countries': ['GB'], 'is_corresponding': False, 'raw_author_name': 'Fernando C.N. Pereira', 'raw_affiliation_strings': ['Department of Artificial Intelligence, University of Edinburg, UK'], 'affiliations': [{'raw_affiliation_string': 'Department of Artificial Intelligence, University of Edinburg, UK', 'institution_ids': []}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5034706259', 'display_name': 'David H. Warren', 'orcid': 'https://orcid.org/0000-0001-8449-3524'}, 'institutions': [], 'countries': ['GB'], 'is_corresponding': False, 'raw_author_name': 'David H.D. Warren', 'raw_affiliation_strings': ['Department of Artificial Intelligence, University of Edinburg, UK'], 'affiliations': [{'raw_affiliation_string': 'Department of Artificial Intelligence, University of Edinburg, UK', 'institution_ids': []}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 0, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': {'value': 3670, 'currency': 'USD', 'value_usd': 3670, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 33.405, 'has_fulltext': False, 'cited_by_count': 997, 'citation_normalized_percentile': {'value': 0.999664, 'is_in_top_1_percent': True, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 99, 'max': 100}, 'biblio': {'volume': '13', 'issue': '3', 'first_page': '231', 'last_page': '278'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10181', 'display_name': 'Natural Language Processing Techniques', 'score': 0.9998, '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/T10181', 'display_name': 'Natural Language Processing Techniques', 'score': 0.9998, '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/T10260', 'display_name': 'Software Engineering Research', 'score': 0.9905, 'subfield': {'id': 'https://openalex.org/subfields/1710', 'display_name': 'Information Systems'}, '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/T13629', 'display_name': 'Text Readability and Simplification', 'score': 0.9882, '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/definite-clause-grammar', 'display_name': 'Definite clause grammar', 'score': 0.762049}, {'id': 'https://openalex.org/keywords/formalism', 'display_name': 'Formalism (music)', 'score': 0.6144218}], 'concepts': [{'id': 'https://openalex.org/C97169998', 'wikidata': 'https://www.wikidata.org/wiki/Q1582738', 'display_name': 'Definite clause grammar', 'level': 5, 'score': 0.762049}, {'id': 'https://openalex.org/C41008148', 'wikidata': 'https://www.wikidata.org/wiki/Q21198', 'display_name': 'Computer science', 'level': 0, 'score': 0.70643234}, {'id': 'https://openalex.org/C199360897', 'wikidata': 'https://www.wikidata.org/wiki/Q9143', 'display_name': 'Programming language', 'level': 1, 'score': 0.61884564}, {'id': 'https://openalex.org/C73301696', 'wikidata': 'https://www.wikidata.org/wiki/Q5469984', 'display_name': 'Formalism (music)', 'level': 3, 'score': 0.6144218}, {'id': 'https://openalex.org/C81721847', 'wikidata': 'https://www.wikidata.org/wiki/Q163468', 'display_name': 'Prolog', 'level': 2, 'score': 0.4944873}, {'id': 'https://openalex.org/C169590947', 'wikidata': 'https://www.wikidata.org/wiki/Q47506', 'display_name': 'Compiler', 'level': 2, 'score': 0.48859888}, {'id': 'https://openalex.org/C53893814', 'wikidata': 'https://www.wikidata.org/wiki/Q7378909', 'display_name': 'Rule-based machine translation', 'level': 2, 'score': 0.48857793}, {'id': 'https://openalex.org/C67621940', 'wikidata': 'https://www.wikidata.org/wiki/Q3113340', 'display_name': 'L-attributed grammar', 'level': 4, 'score': 0.3798451}, {'id': 'https://openalex.org/C154945302', 'wikidata': 'https://www.wikidata.org/wiki/Q11660', 'display_name': 'Artificial intelligence', 'level': 1, 'score': 0.3646028}, {'id': 'https://openalex.org/C204321447', 'wikidata': 'https://www.wikidata.org/wiki/Q30642', 'display_name': 'Natural language processing', 'level': 1, 'score': 0.36417848}, {'id': 'https://openalex.org/C97212296', 'wikidata': 'https://www.wikidata.org/wiki/Q338047', 'display_name': 'Context-free grammar', 'level': 3, 'score': 0.3216462}, {'id': 'https://openalex.org/C186644900', 'wikidata': 'https://www.wikidata.org/wiki/Q194152', 'display_name': 'Parsing', 'level': 2, 'score': 0.2840825}, {'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}, {'id': 'https://openalex.org/C153349607', 'wikidata': 'https://www.wikidata.org/wiki/Q36649', 'display_name': 'Visual arts', 'level': 1, 'score': 0.0}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1016/0004-3702(80)90003-x', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S196139623', 'display_name': 'Artificial Intelligence', 'issn_l': '0004-3702', 'issn': ['0004-3702', '1872-7921'], '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': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [{'id': 'https://metadata.un.org/sdg/4', 'score': 0.68, 'display_name': 'Quality education'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 19, 'referenced_works': ['https://openalex.org/W1559147707', 'https://openalex.org/W1572965756', 'https://openalex.org/W1578088218', 'https://openalex.org/W1608811815', 'https://openalex.org/W1875147508', 'https://openalex.org/W2035032881', 'https://openalex.org/W2049583580', 'https://openalex.org/W2060973547', 'https://openalex.org/W2075322664', 'https://openalex.org/W2100738443', 'https://openalex.org/W2104416102', 'https://openalex.org/W2112962394', 'https://openalex.org/W2122472280', 'https://openalex.org/W2134495021', 'https://openalex.org/W2212036697', 'https://openalex.org/W2911287641', 'https://openalex.org/W2914215741', 'https://openalex.org/W3003374142', 'https://openalex.org/W3036961054'], 'related_works': ['https://openalex.org/W59084530', 'https://openalex.org/W4386333039', 'https://openalex.org/W4286266684', 'https://openalex.org/W3013359325', 'https://openalex.org/W281298494', 'https://openalex.org/W2543110176', 'https://openalex.org/W2073788202', 'https://openalex.org/W2055334547', 'https://openalex.org/W1557335907', 'https://openalex.org/W144732315'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2161160885', 'counts_by_year': [{'year': 2024, 'cited_by_count': 4}, {'year': 2023, 'cited_by_count': 2}, {'year': 2022, 'cited_by_count': 6}, {'year': 2021, 'cited_by_count': 8}, {'year': 2020, 'cited_by_count': 3}, {'year': 2019, 'cited_by_count': 5}, {'year': 2018, 'cited_by_count': 7}, {'year': 2017, 'cited_by_count': 10}, {'year': 2016, 'cited_by_count': 10}, {'year': 2015, 'cited_by_count': 10}, {'year': 2014, 'cited_by_count': 17}, {'year': 2013, 'cited_by_count': 50}, {'year': 2012, 'cited_by_count': 12}], 'updated_date': '2024-12-15T23:07:16.074858', 'created_date': '2016-06-24'}