. . MEDICAL : HEALTH : DATABASES : SUBJECT CLASSIFICATION SYSTEMS : LIBRARIES: NATIONAL LIBRARY OF MEDICINE: NLM Classification 2014 . . NLM Classification 2014A product of the National Library of Medicine for the arrangement of library materials in the field of medicine and related sciences used internationally.
Outline of the NLM Classification Index to the NLM Classification Table G (geographic notation) 19th Century Schedule Class Numbers Added and Canceled (Current Edition) Class Numbers Added (Cumulative List) Canceled Class Numbers (Cumulative List) NLM Classification Materials Download the NLM Classification NLM Classification Poster Questions or Comments custserv@xxxxxxxxxxx About the NLM Classification About the Index NLM Classification Practices Table G Practices NLM Policy on Subject Analysis and Classification Fundamentals of the NLM Classification [online training] Other NLM Resources NLM Cataloging Section homepage NLM Catalog or LocatorPlus MeSH Browser Introduction to MeSH . . About the NLM Classification http://www.nlm.nih.gov/class/nlmclassintro.html . Scope of Revision Historical Development Structure of the NLM Classification Relationship to MeSH Index Scope of RevisionThis edition incorporates all 2014 additions and changes to the schedules (see Class Numbers Added and Canceled) and to the index, which has been newly edited and updated with appropriate MeSH concepts. One hundred and five (105) new index entries were created of which forty-two (42) are from the 2014 MeSH; the remainder are MeSH terms from previous years. Numerous main index entries and cross references were modified to reflect changes in the MeSH vocabulary. Thirty-nine (39) index entries were deleted.
Although the broad nature of the NLM Classification schedules precludes complete correspondence with MeSH, new class numbers were added and existing class numbers were canceled as needed to reflect other changes in MeSH and the biomedical and related sciences literature cataloged.
The QS (Human Anatomy) and QT (Physiology) schedules were the major area of focus for the 2014 edition.
Two (2) QT schedule outline headers were changed: QT 180-245 Physiology. Hygiene was changed to QT 180-245 Hygiene.QT 250-275 Leisure Activities. Sports Medicine was changed to QT 250-275 Leisure Activities. Sports. Sports Medicine. Some QS and QT class number captions and notes were revised to better reflect the scope of the number. For example:
At QS 26.5, the note was added: Classify here works on Visible Human Projects. At QS 504, the note was added: Includes works on comparative histology between humans and animals. At QS 645, the caption was changed from Placentation. Fetal membranes to Placentation. Extraembryonic membranes At QT 4, the caption was changed from General works, including comparative physiology to General works. The note was changed from Classify material on comparative physiology limited to animals in QP to Includes works on comparative physiology between humans and animals. Classify material on human physiology only in QT 104. Classify animal physiology in QP, QL, or SF. At QT 34, the caption was changed from Biophysics to Biophysical phenomena. At QT 36, the caption was changed from Biomedical engineering to Bioengineering. Biomedical engineering (General). At QT 36.5, the caption was changed from Nanotechnology to Microtechnology. Nanotechnology.
At QT 150, the caption was changed from Hot climates to Hot temperature.At QT 250, the caption was changed from Recreation. Outdoor activities to Leisure activities.
Changes were made to other class schedules. For example:At WA 260, the note was added: Classify works on protective devices in sports and leisure activities in QT 250-261. At WB 480, the caption was changed from Ultraviolet therapy. Sunlight. Light therapy to Ultraviolet therapy. Heliotherapy. Light therapy. At WD 610, the caption was changed from Hot Temperature to Heat stress disorders. At WN 600, the note was added: Classify works on the effects of non-ionizing radiation on humans in QT 162.U4.
Changes were made to Table G (Geographic Notations). Four (4) Table G numbers were added: DB9--British Virgin Islands DC25--Caribbean Netherlands DC95--Curao DS5--Sint Maarten Three (3) cross references were added: Saba see Caribbean Netherlands St. Eustatius see Caribbean Netherlands Virgin Islands of the United States see United States Virgin Islands One Table G number caption was modified:DV5--Virgin Islands of the United States was changed to United States Virgin Islands
Two (2) Table G numbers were relocated:DN4--Netherlands Antilles was moved to the Historical Geographic Locations section
JI5Indochina was moved to the Obsolete Table G Notations section Historical DevelopmentThe genesis of the NLM Classification is a Survey Report on the Army Medical Library, published in 1944, which recommended that the "Library be reclassified according to a modern scheme," and that the new scheme be a mixed notation (letters and numbers) resembling that of the Library of Congress. Subsequently a classification committee was formed, chaired by Keyes D. Metcalf and including Mary Louise Marshall who compiled the schedules. Medical specialists acted as consultants to the committee. Based on the consultants' advice, that of the committee and of the NLM cataloging staff, Ms. Marshall produced a preliminary edition of the Library's Classification, which was issued in 1948.
The preliminary edition was revised by Frank B. Rogers and the first edition of the new classification was published in 1951 as the U.S. Army Medical Library Classification. It firmly established the current structure of the classification and NLM's classification practices. The headings for the individual schedules were given in brief form (e.g., WE - Musculoskeletal System; WG - Cardiovascular System) and together they provided an outline of the subjects that constitute the National Library of Medicine Classification . These headings were interpreted broadly as including the physiological system, the specialty or specialties connected with them, the regions of the body chiefly concerned and subordinate related fields. Within each schedule, division by organ usually has priority. All schedules, including some of their sections, are preceded by a group of form numbers representing publication types. These numbers, ranging generally from 1-39, are employed as mnemonic devices throughout the Classification.
Beginning with the 2002 edition, the National Library of Medicine Classification is published in electronic form and updated annually:
The online environment offers many advantages to users including hyperlinks between class numbers in the index and the schedules, and between terms within the index and direct links from these to the MeSH record itself under the MeSH Browser.
The online data creation and maintenance system of the Classification gives NLM the ability to update the classification annually in tandem with MeSH. 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 http://www.nlm.nih.gov/class/terms_cond.html.
Structure of the NLM ClassificationThe National Library of Medicine Classification covers the field of medicine and related sciences, utilizing schedules QS-QZ and W-WZ, permanently excluded from the Library of Congress (LC) Classification schedules. The various schedules of the LC Classification supplement the NLM Classification for subjects bordering on medicine and for general reference materials. The LC schedules for Human Anatomy (QM), Microbiology (QR) and Medicine (R) are not used at all by the National Library of Medicine since they overlap the NLM Classification.
Relationship to MeSHThe schedules, with their special requirements for use with all types and forms of materials, preclude strict adherence to the hierarchical arrangement of the Medical Subject Headings (MeSH), the Library's thesaurus for indexing and cataloging. The schedules maintain their own character in order to provide for material, old as well as new, acquired for the Collection, including dictionaries, atlases, directories and other items, which are not suitable for the arrangements, found in MeSH. However, an effort was made to make schedule headings, subheadings and class number captions compatible with MeSH terminology. The MeSH Tree Structures were used extensively to determine the proper placement of a concept in a schedule and to relate index headings to one another. Since the representation of subjects in the schedules of the NLM Classification is intentionally broad, the captions do not enumerate all of the subordinate concepts that are to be classified in a given number. MeSH descriptors for these subordinate concepts do appear in the index, to the extent practical with appropriate references to the classification numbers.
IndexThe Index to the NLM Classification consists primarily of Medical Subject Heading (MeSH) concepts used in cataloging. It includes concepts first appearing in the latest edition of MeSH and other older concepts as warranted by the literature cataloged. It also provides access to classification numbers through these MeSH concepts. Index entries are updated annually to reflect additions and changes of the latest edition of MeSH. For additional information on the Index see About the Index.
. Outline of the NLM Classification http://www.nlm.nih.gov/class/OutlineofNLMClassificationSchedule.html . . Preclinical Sciences: QS Human Anatomy QT Physiology QU Biochemistry. Cell Biology and Genetics QV Pharmacology QW Microbiology and Immunology QX Parasitology QY Clinical Pathology QZ Pathology Medicine and Related Subjects: W General Medicine. Health Professions WA Public Health WB Practice of Medicine WC Communicable Diseases WD Disorders of Systemic, Metabolic or Environmental Origin, etc. WE Musculoskeletal System WF Respiratory System WG Cardiovascular System WH Hemic and Lymphatic Systems WI Digestive System WJ Urogenital System WK Endocrine System WL Nervous System WM Psychiatry WN Radiology. Diagnostic Imaging WO Surgery WP Gynecology WQ Obstetrics WR Dermatology WS Pediatrics WT Geriatrics. Chronic Disease WU Dentistry. Oral Surgery WV Otolaryngology WW Ophthalmology WX Hospitals and Other Health Facilities WY Nursing WZ History of Medicine. Medical Miscellany 19th Century Schedule . . Index to NLM 2014 Classification http://wwwsvlt.nlm.nih.gov/class/docs/index_18.html . . MESH Browser http://www.nlm.nih.gov/mesh/MBrowser.html . MESH Home http://www.nlm.nih.gov/mesh/meshhome.html MeSH Browser Online searching of MeSH vocabulary About the MeSH Browser Suggestions for authors' keywords All About MeSH MeSH Fact Sheet Publications and presentations by MeSH staff Introduction to MeSH Information from Previous Years Obtaining MeSH Download electronic copies. Lists of Annual Changes to MeSH. MeSH Vocabulary Suggestions MeSH vocabulary suggestions What's New 2014 MeSH Files Available Related Efforts Unified Medical Language System (UMLS) NLM Classification RxNorm DailyMed MeSH Staff Biographies and email Publications and presentations Files Available to Download http://www.nlm.nih.gov/mesh/filelist.htmlDownload of any of the full data files requires the completion of an online Memorandum of Understanding.
2014 MeSHThese formatted versions of the entire MeSH vocabulary are available to download. For best results in downloading, use of a graphical interface is recommended. 2014 MeSH in XML format. MeSH descriptors and qualifiers, and Supplementary Concept Records (formerly Supplementary Chemical Records) in XML format. Files are updated weekly. Supplementary records are compatible with 2014 MeSH descriptors. Descriptor file is 292MB in size, uncompressed. Compressed file is 15MB.
Sample XML XML Data Elements DTD files Descriptor DTD Qualifier DTD SCR DTD About XML MeSH Conversion Table Conversion from ASCII MeSH format to XML Introduction to XML MeSH2014 MeSH in ASCII format. MeSH descriptors and qualifiers, and Supplementary Concept Records (formerly Supplementary Chemical Records), in ASCII format. Files are updated weekly. The descriptor file is 28MB in size and may take more than 30 minutes to download using a connection 2400 bps or slower. Postings data in descriptor and qualifier records reflect updates in citation files through the October, 2000 entry month. Note that subfield separator for descriptor entry terms has been changed from a colon to a bar (|) in order to make it easier to parse terms containing colons.
Sample Text About ASCII MeSH2014 MeSH Trees. MeSH main headings with the tree numbers that place the heading in a hierarchical arrangement. Sorted by tree number. ASCII format. [2.1MB]
Sample Text About MeSH Trees2014 MeSH in MARC format. MeSH vocabulary data in the USMARC authority format.
These files are also available for 2014 MeSH: Pharmacologic Actions - 2014. Substances with a given Pharmacologic Action - 2014 Sample XML, DTD About Pharmacologic Action filesNew Headings with Scope Notes - 2014. Main headings that are new for 2014 with scope notes (definitions), cross-references, and other information. MeSH Replaced Headings - 2014. Main headings that have changed form for 2014 or have been deleted.
2014 Descriptors - preferred term onlyMeSH MN (tree number) Changes - 2014. Main headings in which there has been a change in the MN (MeSH tree Number) for 2014. 2013 MeSH in XML format. MeSH descriptors and qualifiers, and Supplementary Concept Records (formerly Supplementary Chemical Records) in XML format. Files are updated weekly. Supplementary records are compatible with 2013 MeSH descriptors. Descriptor file is 292MB in size, uncompressed. Compressed file is 15MB.
Sample XML XML Data Elements DTD files Descriptor DTD Qualifier DTD SCR DTD About XML MeSH Conversion Table Conversion from ASCII MeSH format to XML Introduction to XML MeSH2013 MeSH in ASCII format. MeSH descriptors and qualifiers, and Supplementary Concept Records (formerly Supplementary Chemical Records), in ASCII format. Files are updated weekly. The descriptor file is 28MB in size and may take more than 30 minutes to download using a connection 2400 bps or slower. Postings data in descriptor and qualifier records reflect updates in citation files through the October, 2000 entry month. Note that subfield separator for descriptor entry terms has been changed from a colon to a bar (|) in order to make it easier to parse terms containing colons.
Sample Text About ASCII MeSH2013 MeSH Trees. MeSH main headings with the tree numbers that place the heading in a hierarchical arrangement. Sorted by tree number. ASCII format. [2.1MB]
Sample Text About MeSH Trees2013 MeSH in MARC format. MeSH vocabulary data in the USMARC authority format.
This file is also available for 2013 MeSH: Substances with a given Pharmacologic Action - 2013. 2012 MeSH2012 MeSH in MARC format. MeSH vocabulary data in the USMARC authority format.
2004 MeSH2004 MeSH files for TREC (Text REtrieval Conference) Genomics track. For use by the TREC community with the 2004 MEDLINE/PubMed Baseline. MeSH ELHILL Format Document (PDF format): This is a description of the MeSH data elements in the ELHILL Unit Record Format (EURF), NLM's former format for distributing MeSH on tape. Most elements are common to both the ASCII and EURF MeSH formats and so the description of MeSH data in the EUR format may be of interest to those downloading the ASCII MeSH files from the Web.
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