%sig-block-elements; Signature Block Elements

Elements that can be included along with data characters inside the content model for the <sig-block> element.
Declaration
<!ENTITY % sig-block-elements
                         "| %break.class; | %emphasis.class; |
                          %just-base-display.class; |
                          %inline-display-noalt.class; |
                          %phrase-content.class; |
                          %sig.class; | %subsup.class;"              >
Expanded Declaration

| break | bold | fixed-case | italic | monospace | overline | roman | sans-serif | sc | strike | underline | ruby | alternatives | graphic | media | inline-graphic | inline-media | private-char | named-content | styled-content | sig | sub | sup