The set of conditions under which people are allowed to use an article, or other license-related information or restrictions
Best practice is to use the <license> element only within the container element <permissions>. The <license> element is allowed outside the permissions wrapper only for reasons of backwards compatibility.
The current <license> element is a place-holder element that may change after the AIT Working Group has done additional analysis.
<!ELEMENT license %license-model; >
... <article-meta> ... <permissions> <copyright-statement>Copyright: © 2004 Eichenberger et al.</copyright-statement> <copyright-year>2004</copyright-year> <license license-type="open-access" xlink:href="https://creativecommons.org/licenses/by/2.0/"> <p>This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</p> </license> </permissions> <related-article related-article-type="companion" xlink:title="synopsis" xlink:href="10.1371/journal.pbio.0020359" vol="2" page="e359"> <article-title>How to Make a Mother in Five Easy Steps</article-title> </related-article> ... </article-meta> ...