This attribute can be used with two elements:
- To identify the kind of source providing an award that sponsored a work
or the research on which a work was based (with the element <funding-source>).
- To identify the type of publication, for example, a “
”, or “
” that is (or contains) the target of the <related-object>.
||Text, numbers, or special characters.
|Restriction: This attribute may be specified if the element is used.