Textual material that is outside the flow of the narrative text, for example, a sidebar, marginalia, text insert, caution or note box, etc. This is an NLM not an APA element.
((object-id)*, sec-meta?, label?, caption?, (address | alternatives | array | graphic | preformat | disp-formula | p | def-list | list | mml:math | related-article | ack | disp-quote | speech | statement | verse-group)*, (sec)*, (fn-group | ref-list)*, (attrib | permissions)*)
The following, in order:
display3.ent