{"id":"https://openalex.org/W366166609","doi":null,"title":"Policy of revision of the Universal Decimal Classification (4) : Making free numbers of two or three digits","display_name":"Policy of revision of the Universal Decimal Classification (4) : Making free numbers of two or three digits","publication_year":1958,"publication_date":"1958-01-01","ids":{"openalex":"https://openalex.org/W366166609","mag":"366166609"},"language":"en","primary_location":{"id":"mag:366166609","doi":null,"is_oa":true,"landing_page_url":"https://ci.nii.ac.jp/naid/110002773426","pdf_url":null,"source":{"id":"https://openalex.org/S2764788157","display_name":"UDC information","issn_l":"2189-8251","issn":["2189-8251"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"UDC information","raw_type":null},"volume":null,"type":"article","indexed_in":[],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://ci.nii.ac.jp/naid/110002773426","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5089577373","display_name":"Duyvis F. Donker","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Duyvis F. Donker","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5089577373"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.03988183,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"47","issue":"47","first_page":"20","last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T14330","display_name":"Library Science and Information Systems","score":0.9404000043869019,"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"}},"topics":[{"id":"https://openalex.org/T14330","display_name":"Library Science and Information Systems","score":0.9404000043869019,"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/T13673","display_name":"Library Science and Information","score":0.0071000000461936,"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/T11657","display_name":"Digital and Traditional Archives Management","score":0.0038999998942017555,"subfield":{"id":"https://openalex.org/subfields/1206","display_name":"Conservation"},"field":{"id":"https://openalex.org/fields/12","display_name":"Arts and Humanities"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/universal-decimal-classification","display_name":"Universal Decimal Classification","score":0.9990000128746033},{"id":"https://openalex.org/keywords/classification-revision","display_name":"classification revision","score":0.6690000295639038},{"id":"https://openalex.org/keywords/two-digit-numbers","display_name":"two-digit numbers","score":0.656000018119812},{"id":"https://openalex.org/keywords/three-digit-numbers","display_name":"three-digit numbers","score":0.9929999709129333},{"id":"https://openalex.org/keywords/subject-classification","display_name":"subject classification","score":0.3790000081062317},{"id":"https://openalex.org/keywords/library-classification","display_name":"library classification","score":0.35100001096725464}],"concepts":[{"id":"https://openalex.org/C94375191","wikidata":"https://www.wikidata.org/wiki/Q11205","display_name":"Arithmetic","level":1,"score":0.6512695550918579},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.6496760845184326},{"id":"https://openalex.org/C65045869","wikidata":"https://www.wikidata.org/wiki/Q81365","display_name":"Decimal","level":2,"score":0.6255089044570923},{"id":"https://openalex.org/C94957134","wikidata":"https://www.wikidata.org/wiki/Q82990","display_name":"Numerical digit","level":2,"score":0.5126442313194275},{"id":"https://openalex.org/C204160518","wikidata":"https://www.wikidata.org/wiki/Q122653","display_name":"Numeral system","level":2,"score":0.4145694375038147},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.3278527855873108}],"mesh":[],"locations_count":1,"locations":[{"id":"mag:366166609","doi":null,"is_oa":true,"landing_page_url":"https://ci.nii.ac.jp/naid/110002773426","pdf_url":null,"source":{"id":"https://openalex.org/S2764788157","display_name":"UDC information","issn_l":"2189-8251","issn":["2189-8251"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":"UDC information","raw_type":null}],"best_oa_location":{"id":"mag:366166609","doi":null,"is_oa":true,"landing_page_url":"https://ci.nii.ac.jp/naid/110002773426","pdf_url":null,"source":{"id":"https://openalex.org/S2764788157","display_name":"UDC information","issn_l":"2189-8251","issn":["2189-8251"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"UDC information","raw_type":null},"sustainable_development_goals":[],"sustainable_development_goals_aurora":[{"id":"https://metadata.un.org/sdg/10","score":0.4399999976158142,"display_name":"Reduced inequalities"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2034075762","https://openalex.org/W2797894913","https://openalex.org/W2948350667","https://openalex.org/W167488276","https://openalex.org/W3016982614","https://openalex.org/W2821323333","https://openalex.org/W2594636170","https://openalex.org/W2959576148","https://openalex.org/W2489600555","https://openalex.org/W2350482071","https://openalex.org/W139139907","https://openalex.org/W963267312","https://openalex.org/W2085172012","https://openalex.org/W3021248730","https://openalex.org/W2796577498","https://openalex.org/W83856261","https://openalex.org/W1982430709","https://openalex.org/W2868749861","https://openalex.org/W22191056","https://openalex.org/W2468097068"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2025-10-10T17:16:08.811792","created_date":"2025-10-10T00:00:00"}