Elements that can be included along with data characters inside the content model for the <sig> element.
<!ENTITY % sig-elements "%rendition-plus; | %break.class; | %inline-display-noalt.class; | %just-base-display-noalt.class;" >
| bold | italic | monospace | overline | roman | sans-serif | sc | strike | underline | sub | sup | named-content | styled-content | break | inline-graphic | private-char | graphic | media
JATS-common1.ent