Model

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                        "((%id.class;)*, %sec-opt-title-model; )"    >

Expanded Model

((object-id)*, (sec-meta?, label?, title?, (address | alternatives | array | boxed-text | chem-struct-wrap | code | fig | fig-group | graphic | media | preformat | 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)*, (sec)*, (notes | fn-group | glossary | ref-list)* ) )