Individual component of a multi-part subject (for example, subject term, code for the term).
Any combination of:
Text, numbers, or special characters
Emphasis Elements
<bold> Bold
<italic> Italic
<monospace> Monospace Text (Typewriter Text)
<overline> Overline
<roman> Roman
<sans-serif> Sans Serif
<sc> Small Caps
<strike> Strike Through
<underline> Underline
<alternatives> Alternatives For Processing
Inline Display Elements
<inline-graphic> Graphic, Inline
<private-char> Private Character (Custom or Unicode)
<chem-struct> Chemical Structure (Display)
<inline-formula> Formula, Inline
<named-content> Named Special (Subject) Content
<styled-content> Styled Special (Subject) Content
<sub> Subscript
<sup> Superscript