Medical Subject Headings
The MeSH system is maintained and revised by the United States National Library of Medicine . It is mainly used for the MEDLINE database , which is made available to the public for free research via the PubMed Internet portal operated by the National Center for Biotechnology Information .
A German translation of the MeSH will be created by DIMDI in Cologne. All main headings, all subheadings and almost all entry terms have been translated. The introductory vocabulary has been expanded by around 6,000 German terms.