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The purpose of a DTD (Document Type Definition) is to define the building blocks of an XML document. It defines the document structure with a list of allowable elements. Below are the DTDs that define NLM's XML data.
See also the Entrez DTDs.
2009 MeSH®
For more information, see the MeSH Download page.
Last reviewed: 15 December 2008
Last updated: 15 December 2008
First published: 17 October 2006
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