One physical or logical line of an address.
Any combination of:
Text, numbers, or special characters
<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
<private-char> Private Character (Custom or Unicode™)
<chem-struct> Chemical Structure (Display)
<inline-formula> Formula, Inline
<abbrev> Abbreviation or Acronym
<milestone-end> Milestone End
<milestone-start> Milestone Start
<named-content> Named Special (Subject) Content
<styled-content> Styled Special (Subject) Content
<sub> Subscript
<sup> Superscript
<country> Country: in an Address
<fax> Fax Number: in an Address
<institution> Institution Name: in an Address
<phone> Phone Number: in an Address