%support-source-elements; Support Source Elements

Elements that may be mixed with text inside the <support-source> element
Declaration
<!ENTITY % support-source-elements
                        "%simple-text; | %institution-wrap.class;"   >
Expanded Declaration

| email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | fixed-case | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | ruby | alternatives | inline-graphic | inline-media | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | index-term | index-term-range-end | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x | institution | institution-wrap