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| Medical Subject Headings | |
2009 MeSH/MARC
Download of any of the full data files requires the completion of an online memorandum of understanding.
Conversion Information
- Download NLM 1999 Conversion Specifications (pdf format). This is the most current version. Form, language, and geographic qualifiers (subheadings) have been removed from MeSH. Any reference to these three types of records should be ignored.
- The NLM Conversion Specifications are to be used in conjunction with another document, USMARC Specifications for Record Structure, Character Sets, and Exchange Media for sale by the Cataloging Distribution Service, Library of Congress.
MeSH/MARC files available to download
Beginning with 2009 MeSH, if any changes in MeSH data are made in the middle of the year, a monthly full file and change file with these changes will be made available. Note that these monthly change files will include only changes made during that month - the changes are not cumulative. Mid-year change files that are available are indicated below.
The data are encoded in MARC-8. These files can only be transferred via FTP into a save file. A file extension of .bin has been used to prompt the local receiving computer to automatically open a file to save the data.
For users of Internet Explorer, if you want to save a file to your local hard drive rather than open it, you must right-click the link and then select Save Target As....
The full file is estimated to take 5 minutes to download on a T3 communications line (at 45 Mbps) and longer on slower lines.
- Annual files
- Sample file contains 41 descriptor records, 83 qualifier records, and 870 descriptor/qualifier combinations, for a total of 994 records. Download sample file [320KB]
- Label file provides size and other statistics for the sample file. [72B]
- Label file provides size and other statistics for the sample file. [72B]
- Update-only file contains new and modified terms with 3,864 descriptor records, 28 qualifier records, and 11,143 descriptor/qualifier combinations, for a total of 14,977 records. Download update-only file [6MB]
- Label file provides size and other statistics for the update file. [72B]
- Label file provides size and other statistics for the update file. [72B]
- Full file contains all terms with 25,186 descriptor records, 83 qualifier records, and 564,547 descriptor/qualifier combinations, for a total of 589,816 records. Download full file [145MB]
- Label file provides size and other statistics for the full file. [74B]
Summary contents of files. 2009 MeSH/MARC. November 1, 2008.
File Total Records File Size Bytes Full File 589,816 145MB 151,725,167 Update-only File 15,035 6MB 6,216,041 Sample File 994 318KB 325097 - Sample file contains 41 descriptor records, 83 qualifier records, and 870 descriptor/qualifier combinations, for a total of 994 records. Download sample file [320KB]
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Monthly change files
Summary contents of monthly files. 2009 MeSH/MARC. June 2, 2009.Month Total Records File Size Bytes December 2008 28 19KB 20,305 January 2009 1 0.21KB 214 February 2009 0 0KB 0 March 2009 1 0.21KB 214 April 2009 0 0KB 0 May 2009 2 2.9KB 0 June 2009 0 0KB 0 July 2009 22 6.3KB 6,447
- If you have questions concerning the content of MeSH/MARC files or FTP of MeSH/MARC data, please contact:
- Jacque-Lynne Schulman
- Medical Subject Headings
- Telephone: 301-496-1495; FAX: 301-402-2002
- email: schulman@nlm.nih.gov
Last reviewed: 10 July 2009
Last updated: 10 July 2009
First published: 04 December 2008
Metadata| Permanence level: Permanent: Dynamic Content