OASIS CALS table modelsee Table Models (XHTML and OASIS CALS)
obituarysee @article-type
object typesee @object-id-type
obsolete termsee @term-status
on-leave (Contributor is on sabbatical or other leave of absence.)see @fn-type
online datesee @date-type
online location identifiersee <elocation-id>
online versionsee <self-uri>
ontologysee @vocab
op citsee Abbreviated Citations
open accesssee <license>
open access fee informationsee <funding-group>
orationsee @article-type
ORCIDsee <contrib-id>see @contrib-id-type
ordersee <named-content>
orderedsee @list-type
ordered listsee <list>
ordinals in citationssee Ordinal Numbers
organizationsee <aff>
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>
owner, copyrightuse <copyright-holder>