obsolete termsee @term-status
on-leave (contributor is on sabbatical or other leave of absence.)see @fn-type
onlinesee <elocation-id>
online datesee @date-type
online versionsee <self-uri>
ontologysee @kwd-group-typesee @vocab
op citsee Abbreviated Citations
open accesssee <license>
option, correctsee @correct
ORCIDsee <contrib-id>see @contrib-id-type
ordersee <named-content>
orderedsee @list-type
ordered listsee <list>
ordinals in citationssee Tagging Ordinal Numbers
organizationsee <aff>see <institution>
organizational addresssee <address>
organizational authorsee <collab-name>
organization namesee <institution>
original languageuse @lang-variant
originationsee <source>
other information, concerning an authorsee <author-comment>
outlinesee <abstract>
outside flowsee <boxed-text>