Document Type Definitions (DTDs) for NLM Databases
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 XML data.
- pubmed_190101.dtd (01/01/19) For use with 2019, 2020 and 2021 PubMed data.
- 2021 MeSH Descriptor DTD - used for MeSH Vocabulary, companion database to MEDLINE/PubMed
- 2021 MeSH Qualifier DTD
- 2021 MeSH SCR DTD
- 2021 MeSH Pharmacological Action DTD
- Please note: The 2021 DTD files are to be used with 2021 production MeSH.
For more information, see the Download MeSH Data page.
NLM Catalog DTD:
|Current (2021)||Forthcoming (2022)|
List of Serials Indexed for Online Users (LSIOU)
Last Reviewed: January 22, 2021