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<alt-text> Alternate Title Text For a Figure, Etc.

Short phrase used for pronunciation or as an alternative display for a structure or graphical object, typically for reasons of accessibility or graphic-limited devices. For example, <alt-text> may be used to display “behind” a figure, table, graphic, or other structure.
Related Elements
The similarly non-visual element <long-desc> is meant for an extended description of the figure, table, graphic, inline-graphic, etc.
Attributes
content-type
specific-use

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<array>, <chem-struct>, <chem-struct-wrap>, <code>, <disp-formula>, <disp-formula-group>, <fig>, <fig-group>, <graphic>, <inline-graphic>, <inline-supplementary-material>, <media>, <preformat>, <supplementary-material>, <table-wrap>, <table-wrap-group>
Description
Text, numbers, or special characters
Content Model
<!ELEMENT  alt-text     (#PCDATA)                                    >
Tagged Samples
To provide simple text that can be pronounced by eReaders in addition to or instead of visual graphic 
...
<fig id="f00001">
 <label>FIG. 1</label>
 <caption>
  <p>Single-Hub and Double-Hub Cast Iron Soil Pipe Laying Lengths</p>
 </caption>
 <graphic xlink:href="http://www.astm.org/HTTP/IMAGES/A0074_60200.png">
  <alt-text>Single-Hub and Double-Hub Cast Iron Soil Pipe Laying Lengths</alt-text>
 </graphic>
</fig>
...
To provide additional information concerning figure for graphic-impaired 
...
<fig>
 <caption><title>Truth Table</title></caption>
 <alt-text>Truth Table: NOR Gate</alt-text>
 <long-desc>Truth table showing that the output of a NOR gate is zero 
  if any of the input is 1 and the output is 1 only if both the inputs 
  of the gate is 0.</long-desc>
 <graphic xlink:href="flip-flop-NOR-gate.jpg"></graphic>
</fig>
...
To provide readable/pronounceable alternative to inline graphic 
... 
<sec>
 <label>79.1</label>
 <p>Elongate ... in the form of a 
  <private-char description="dogleg">
   <inline-graphic  
     xlink:href="http://www1.astm.org/HTTP/IMAGESxHTML/images/glyphs/ASTM_SpecChar/dogleg_12">
    <alt-text content-type="special character">dogleg character</alt-text>
   </inline-graphic>
  </private-char>. During the ...</p>
</sec>
...
Related Resources