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%face-markup.class; Face Markup Elements

All of the emphasis/rendition elements except the <ruby> element, for use (initially) inside the <ruby> element itself.
Declaration
<!ENTITY % face-markup.class
                        "bold | fixed-case | italic | monospace |
                         overline | overline-start | overline-end |
                         roman | sans-serif | sc | strike |
                         underline | underline-start | 
                         underline-end"                              >
Expanded Declaration

bold | fixed-case | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end