An official website of the United States government.

The .gov means it’s official.
Federal government websites always use a .gov or .mil domain. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar.

This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely.

What data elements are required on each record?

The following metadata elements are required on all records that are indexed. Each element has examples below.

Declaration (XML Schema or DTD---is required above the first record)
Article title (in English)
Personal author(s)/contributor(s); affiliation of the first author
Language (if no language is noted, English is assumed)
Abstract (in English)
Pagination (first page, last page, if noted)
Journal title
Publisher name
ISSN (print and electronic if both are available)
Identifier: Digital Object Identifier (DOI) or URL link, if available
Extent (First page, last page)
Volume number
Issue number
Date of publication