Content Model

<!ENTITY % toc-div-model
                        "(title-group?, 
                          (%contrib-group.class; | %para-level;)*,
                          (%struct-link.class;)?,
                          (%toc-entry.class; | %toc-div.class;)+ )"  >

Expanded Content Model

(title-group?, (contrib-group | address | alternatives | answer | answer-set | array | boxed-text | chem-struct-wrap | code | fig | fig-group | graphic | media | preformat | question | question-wrap | supplementary-material | table-wrap | table-wrap-group | disp-formula | disp-formula-group | def-list | list | tex-math | mml:math | p | related-article | related-object | ack | disp-quote | speech | statement | verse-group | x)*, (ext-link | nav-pointer | nav-pointer-group)?, (toc-entry | toc-div)+ )