Agency or organization that funded the research on which a work was based.
A few example organizations are the Wellcome Trust, NIH, HHS, Princeton University, or sometimes a corporation such as Alcoa sponsoring the research on which a document was based.
<!ELEMENT funding-source (#PCDATA %funding-source-elements;)* >
(#PCDATA | email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | fixed-case | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | ruby | alternatives | inline-graphic | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | index-term | index-term-range-end | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x | institution | institution-wrap)*
Any combination of:
... <book-meta> ... <kwd-group kwd-group-type="author">...</kwd-group> <funding-group> <funding-statement>L.S.Y. is the recipient of a <award-id id="MBS" award-type="scholarship">Martha Becker Scholarship Award</award-id> from the <funding-source rid="MBS">Alzheimer & Dementia Foundation</funding-source>. This work was also supported by a grant from the <funding-source id="IOA">Institute on Aging</funding-source> (grant no. <award-id rid="IOA" award-type="grant">634-TL-88953</award-id>), and <funding-source id="NIDE">National Institute for Diseases of the Elderly</funding-source> contract no. <award-id rid="NIDE" award-type="contract">GCB-792-55648</award-id> (H.S.C.).</funding-statement> <open-access> <p>Page charge payment having partially discharged this article’s publication costs, this article is designated as an “advertisement” under 18 U.S.C. section 1734.</p> </open-access> </funding-group> </book-meta> ...
... <book-meta> ... <book-title-group>...</book-title-group> ... <funding-group> <award-group id="gs1" > <funding-source>National Institutes of Health</funding-source> <award-id>GM18458</award-id> </award-group> <award-group id="gs2"> <funding-source>National Science Foundation</funding-source> <award-id>DMS-0204674</award-id> <award-id>DMS-0244638</award-id> </award-group> </funding-group> </book-meta> ...