Content Model

<!ENTITY % chem-struct-elements
                        "| %access.class; | %address-link.class; |
                         %break.class; |
                         %emphasis.class; | %label.class; |
                         %list.class; | %math.class; |
                         %phrase-content.class; |
                         %simple-display.class; |
                         %simple-link.class; | %subsup.class; "      >

Expanded Content Model

| alt-text | long-desc | email | ext-link | uri | break | bold | fixed-case | italic | monospace | overline | roman | sans-serif | sc | strike | underline | ruby | label | def-list | list | tex-math | mml:math | named-content | styled-content | alternatives | array | code | graphic | media | preformat | fn | target | xref | sub | sup