Any combination of:

• Text, numbers, or special characters

• Linking Elements

  • <email> Email Address

  • <ext-link> External Link

  • <uri> Uniform Resource Identifier (URI)

• <inline-supplementary-material> Inline Supplementary Material

• <related-article> Related Article Information

• <related-object> Related Object Information

• Paragraph-level Display Elements

  • <address> Address/Contact Information

  • <array> Array (Simple Tabulation)

  • <boxed-text> Boxed Text

  • <chem-struct-wrap> Chemical Structure Wrapper

  • <fig> Figure

  • <fig-group> Figure Group

  • <graphic> Graphic

  • <media> Media Object

  • <preformat> Preformatted Text

  • <supplementary-material> Supplementary Material

  • <table-wrap> Table Wrapper

  • <table-wrap-group> Table Wrapper Group

• <alternatives> Alternatives For Processing

• <disp-formula> Formula, Display

• <disp-formula-group> Formula, Display Group

• Citation Elements

  • <citation-alternatives> Citation Alternatives

  • <element-citation> Element Citation

  • <mixed-citation> Mixed Citation

  • <nlm-citation> NLM Citation

• 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

• <award-id> Award Identifier

• <funding-source> Funding Source

• <open-access> Open Access

• <chem-struct> Chemical Structure (Display)

• <inline-formula> Formula, Inline

• Inline Display Elements

  • <inline-graphic> Graphic, Inline

  • <private-char> Private Character (Custom or Unicode)

• Lists

  • <def-list> Definition List

  • <list> List

• Math Elements

  • <tex-math> TeX Math Equation

  • <mml:math> Math (MathML 2.0 Tag Set)

• Other Inline Elements

  • <abbrev> Abbreviation or Acronym

  • <milestone-end> Milestone End

  • <milestone-start> Milestone Start

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

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

• <disp-quote> Quote, Displayed

• <speech> Speech

• <statement> Statement, Formal

• <verse-group> Verse Form for Poetry

• <fn> Footnote

• <target> Target of an Internal Link

• <xref> X (cross) Reference

• <sub> Subscript

• <sup> Superscript