Any combination of:

• Text, numbers, or special characters

• <email> Email Address

• <ext-link> External Link

• <uri> Uniform Resource Indicator (URI)

• <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-graphic> Graphic, Inline

• <chem-struct> Chemical Structure (Display)

• <inline-formula> Formula, Inline

• <abbrev> Abbreviation or Acronym

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

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

• <fn> Footnote

• <target> Target of an Internal Link

• <xref> X (cross) Reference

• <sub> Subscript

• <sup> Superscript

• <break> Line Break