Reference to an object within the standards document (for example, a table, a bibliographic citation, a figure).
Any combination of:
Text, numbers, or special characters
Emphasis Elements
<bold> Bold
<fixed-case> Fixed Case
<italic> Italic
<monospace> Monospace Text (Typewriter Text)
<num> ISO Numeric Emphasis
<overline> Overline
<roman> Roman
<ruby> Ruby Wrapper
<sans-serif> Sans Serif
<sc> Small Caps
<strike> Strike Through
<underline> Underline
Inline Display Elements
<inline-graphic> Inline Graphic
<private-char> Private Character (Custom or Unicode)
<named-content> Named Special (Subject) Content
<styled-content> Styled Special (Subject) Content
Baseline Change Elements
<sub> Subscript
<sup> Superscript