NLM Classification
type: Dataset
description: A product of the National Library of Medicine for the arrangement of library materials in the field of medicine and related sciences used internationally. The NLM Classification is updated twice a year with the winter edition published in January and the summer edition published in August. Publication of printed editions ceased with the 5th revised edition, 1999. Beginning with the 2006 edition, the NLM Classification is also available in PDF (Portable Document Format) at https://www.nlm.nih.gov/class/terms_cond.html
keyword: amerigeo
keyword: amerigeoss
keyword: ckan
keyword: classification
keyword: dataset
keyword: geo
keyword: geoss
keyword: library-services
keyword: national
keyword: north-america
keyword: united-states
issued: 2021-08-26
modified: 2022-05-25
theme: {"NLM Products and Services"}
contact point: Organization
  fn: National Library of Medicine

US Migrating
type: Agent

NLM Policy on Classification
type: Distribution
description: nlm_policy_on_classification.pdf
media type: application/pdf
format: PDF
access URL: https://classification.nlm.nih.gov/static/classification/pdf/nlm_policy_on_classification.pdf
issued: 2022-03-02T08:48:53.956761
modified: 2025-11-21T17:12:06.834246

Class Numbers Added and Canceled (Current Edition)
type: Distribution
media type: text/html
format: HTML
access URL: https://classification.nlm.nih.gov/current_edition_class_numbers
issued: 2022-03-02T08:48:53.956767
modified: 2025-11-21T17:12:06.834669

Class Numbers Added (Cumulative List)
type: Distribution
media type: text/html
format: HTML
access URL: https://classification.nlm.nih.gov/cumulative_class_numbers_added
issued: 2022-03-02T08:48:53.956771
modified: 2025-11-21T17:12:06.835062

Canceled Class Numbers (Cumulative List)
type: Distribution
description: The National Library of Medicine cancels classification numbers from its schedules for a variety of reasons - most often classification numbers are realigned to better reflect their domain and improve collocation of materials on related concepts.
media type: text/html
format: HTML
access URL: https://classification.nlm.nih.gov/cumulative_class_numbers_canceled
issued: 2022-03-02T08:48:53.956773
modified: 2025-11-21T17:12:06.835463

Outline of the NLM Classification
type: Distribution
media type: text/html
format: HTML
access URL: https://classification.nlm.nih.gov/outline
issued: 2022-03-02T08:48:53.956776
modified: 2025-11-21T17:12:06.835848

Table G (Geographic Notation)
type: Distribution
description: Table G is a cutter system of notations that provides geographical or jurisdictional arrangement of materials under specific class numbers in the NLM Classification. The use of Table G permits a shelving order which is controlled geographically and alphabetically.
media type: text/html
format: HTML
access URL: https://classification.nlm.nih.gov/tableg
issued: 2022-03-02T08:48:53.956779
modified: 2025-11-21T17:12:06.836226

19th Century Schedule
type: Distribution
description: Classify here works and reprints of works published between 1801-1913. Classify here translations of works originally published from 1801-1913 only if the translation itself is published from 1801-1913.
media type: text/html
format: HTML
access URL: https://classification.nlm.nih.gov/19century_schedule
issued: 2022-03-02T08:48:53.956781
modified: 2025-11-21T17:12:06.836593