NLM Classification Updated, April 23, 2009
The online National Library of Medicine Classification, available at //www.nlm.nih.gov/class/, has been issued in a newly revised edition as of April 23, 2009.
Seventeen new class numbers were added to the main schedules and four new class numbers were added to the 19th Century schedule (//www.nlm.nih.gov/class/19thcenturyschedule.html). One class number was canceled. Eighty-one MeSH terms were added to the index, including 34 new to the MeSH vocabulary as of 2009; in addition, 71 schedule records and 580 index entries were updated since the 2008 edition was published on April 24, 2008.
Contact NLM for further information, questions, or comments.