Definition List: Term


The word, phrase, graphic, chemical structure, equation, or other “noun” that is being defined or described with a definition in a definition list (two part list). The term occupies the first column of a two-part list and is the subject of the definition or description, which occupies the second column.


id Identifier
rid Reference to an Identifier

Related Elements

A <def-list> may have a <title> naming the entire list, followed by optional headings for terms and their definitions. <term-head> contains the heading over the first (term) column, and <def-head> contains the heading for the second (definition) column; neither serves as a container element for terms or definitions. Individual <term>s and their <def>s are paired in <def-item>s.

Model Information

Content Model

<!ELEMENT  term         (#PCDATA %term-elements;)*                   >


Any combination of:

This element may be contained in:

<def-item> Definition List: Definition Item

Tagged Example

<def-item><term id="G1">PAP I</term>
<def><p>poly(A)polymerase I</p></def>
<def-item><term id="G2">PNPase</term>
<def><p>polynucleotide phosphorylase</p></def>