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 | bold | fixed-case | italic | monospace | overline | roman | sans-serif | sc | strike | underline | ruby | alternatives | inline-graphic | private-char | chem-struct | inline-formula | abbrev | milestone-end | milestone-start | named-content | styled-content | sub | sup | institution | institution-wrap)*
Any combination of:
... <article-meta> ... <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> </article-meta> ...