%x-elements;

X - Generated Text/Punctuation Elements

Elements that can be included along with data characters inside the content model of the <x> element.

Model

<!ENTITY % x-elements   "| %emphasis.class; | %phrase-content.class; |
                         %subsup.class; | %x.class;"                 >

Expanded Model

| bold | fixed-case | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | ruby | named-content | styled-content | sub | sup | x