%comment-elements; Comment Elements

Elements that can be included along with data characters inside the content model of the <comment> element, which is a textual annotation within a citation.
Declaration
<!ENTITY % comment-elements
                        "%simple-phrase;"                            >
Expanded Declaration

| email | ext-link | uri | inline-supplementary-material | related-article | related-object | bold | fixed-case | italic | monospace | overline | roman | sans-serif | sc | strike | underline | 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