Content model for the back matter (<back>) of the document, for example, ancillary material such as appendices
<!ENTITY % back-model "(label?, title*, (%doc-back-matter-mix;)* )" >
(label?, title*, (ack | app-group | bio | fn-group | glossary | ref-list | notes | sec)* )
JATS-archivearticle0.dtd