Any combination of:

• Text, numbers, or special characters

• External Linking Elements

  • <email> Email Address

  • <ext-link> External Link

  • <uri> Uniform Resource Identifier (URI)

• 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

• <named-content> Named Special (Subject) Content

• <styled-content> Styled Special (Subject) Content

• Baseline Change Elements

  • <sub> Subscript

  • <sup> Superscript