OSEO Appendices structure
OSEO has a specific way of structuring the titles in appendices.
//endMatter/appendixGroup/appendix
Capture the content of the appendix as a child div1 element, with the title of the content of the appendix in the div1 element.
<appendixGroup id="actrade-9780199645411-appendixGroup-1">
<appendix doi="10.1093/actrade/9780199645411.appendix.1" id="actrade-9780199645411-appendix-1"><titleGroup id="actrade-9780199645411-titleGroup-328">
<title>
<p><?Page pageId="1330"?>
<milestone num="1330" unit="page" id="actrade-9780199645411-milestone-17427"/>APPENDIX A</p>
</title></titleGroup><textMatter>
<div1 id="actrade-9780199645411-div1-215" doi="10.1093/actrade/9780199645411.div1.215">
<titleGroup id="actrade-9780198124672-titleGroup-238">
<title>
<p alignment="centre">LOST LETTERS</p>
</title>
</titleGroup>
<p>In any correspondence hundreds of years old, a certain number of letters will have
been lost, or at any rate not as yet recovered. In the present case, certain
elements help to identify specific items, and may thus aid future scholars. They are
presented here in the order given above in the Textual Introduction. (This list does
not include letters of which the original only is lost but copies remain).</p>
</div1></textMatter>
</appendix>
</appendixGroup>