Medical Subject Headings
Medical allocated Headings MeSH is a comprehensive controlled vocabulary for the intention of indexing journal articles as well as books in a life sciences. It serves as a thesaurus that facilitates searching. Created as well as updated by the United States National the treasure of cognition of Medicine NLM, this is the used by the MEDLINE/PubMed article database and by NLM's catalog of book holdings. MeSH is also used by ClinicalTrials.gov registry to categorize which diseases are studied by trials registered in ClinicalTrials.
MeSH was presented in the 1960s, with the NLM's own index catalogue and the sent headings of the Quarterly Cumulative Index Medicus 1940 edition as precursors. The yearly printed description of MeSH was discontinued in 2007; MeSH is now usable only online. It can be browsed and downloaded free of charge through PubMed. Originally in English, MeSH has been translated into many other languages and enable retrieval of documents from different origins.