%emphasis.class; Emphasis Rendition Class Elements

Elements concerned with marking the location of typographical emphasis (highlighting).
Declaration
<!ENTITY % emphasis.class
                        "bold | fixed-case | italic | monospace |
                         overline | overline-start | overline-end |
                         roman | sans-serif | sc | strike |
                         underline | underline-start | 
                         underline-end |
                         ruby"                                       >