Individual(s) responsible for the intellectual content of the work reported in the document.
Multiple co-PIs can be included in successive <principal-investigator> elements.
The <principal-award-recipient> may or may not be the same as the <principal-investigator>, for example, a grant could be awarded to a Department or to individual A, and individual B could serve as the Principal Investigator. When the same individual serves in both roles, the name should be listed in both places.
Note that an <institution> may be included as a <principal-award-recipient>, but not as a <principal-investigator>.
<!ELEMENT principal-investigator
(#PCDATA
%principal-investigator-elements;)* >(#PCDATA | contrib-id | name | name-alternatives | string-name)*
Any combination of:
...
<book-meta>
...
<pub-date>...</pub-date>
<funding-group>
<award-group id="NIA94" award-type="grant">
<funding-source>National Institute on Aging</funding-source>
<award-id>AG20962</award-id>
<principal-investigator>
<string-name><given-names>Sharon R.</given-names>
<surname>Kaufman</surname></string-name>
</principal-investigator>
</award-group>
...
</funding-group>
</book-meta>
...