Defines what elements can occur within the Table Data Cell (XHTML table model) element in tables.
<!ENTITY % td.content "( #PCDATA | %Flow.mix; )*" >
( #PCDATA | email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | alternatives | inline-graphic | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x | disp-formula | disp-formula-group | break | chem-struct-wrap | element-citation | mixed-citation | nlm-citation | def-list | list | array | graphic | media | preformat )*
xhtml-table-1.mod