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<legend> Legend

A list or table of the explanations for symbols, characters, terms, or abbreviations, where each entry in the list names a symbol (or similar) and provides a gloss for that symbol. Such lists act as a key to the symbology of a graphic, figure, or table.

Usage/Remarks

Legends typically accompany figures or tables to act as a key to the symbols, characters, or abbreviations used in the graphic, figure, table, etc. Such lists may show a heading such as “Key” (“Légende” in French, “Legende” in German). Legends may also be called “where lists”, “keys”, “variable lists”, “legends”, “symbol charts”, etc., with the exact list heading given as the <title> of the <legend> element.
Attributes
content-type
specific-use

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<boxed-text>, <chem-struct-wrap>, <disp-formula>, <disp-formula-group>, <fig>, <fig-group>, <graphic>, <media>, <supplementary-material>, <table-wrap>, <table-wrap-group>
Description
The following, in order:
Content Model
<!ELEMENT  legend       %legend-model;                               >
Expanded Content Model

(label?, title?, (def-list | list | array | table-wrap | p)*)

Tagged Samples
Key to a Figure (as a table) 
...
<fig id="fig_5" fig-type="figure">
 <label>Figure&#x00A0;5</label>
 <caption>
  <title>Heater energy inputs, outputs and energy balance</title>
 </caption>
 <legend>
  <title>Key</title>
  <table-wrap id="tab_b" position="float" content-type="fig-index">
   <table width="408">
    <col width="18.71%"/>
    <col width="81.29%"/>
    <tbody>
     <tr>
      <td valign="top" align="justify" scope="row">LRH</td>
      <td valign="top" align="justify">Heater energy balance boundary</td>
     </tr>
     <tr>
      <td valign="top" align="justify" scope="row">HF</td>
      <td valign="top" align="justify">Heating fluid balance boundary</td>
     </tr>
     ...
    </tbody>
   </table>
  </table-wrap>
 </legend>
 <graphic xlink:href="005"/>
</fig>
...
Key to a Figure (as a 2-part list) 
...
<fig id="fig_A.1" orientation="portrait">
 <label>Figure A.1</label>
 <caption>
  <title>Field of Application</title>
 </caption>
 <legend>
  <title>Key</title>
  <def-list>
   <def-item>
    <term>I</term>
    <def><p>input</p></def>
   </def-item>
   <def-item>
    <term>O</term>
    <def><p>output</p></def>
   </def-item>
   ...
  </def-list>
 </legend>
 <graphic xlink:href="1234"/>
</fig>
...
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