Word or phrase used to provide a short textual name/description for a structure such as a graphic or figure. The short <alt-text> can be used for special accessibility display or presentation on graphic-limited websites or devices, as an alternative to providing the full graphic. (For example, <alt-text> may be used to display a few words “behind” a figure or graphic.)
This element is not to be used as a replacement for <caption>, which is a visual element displayed as part of a figure, table, etc. The <alt-text> is not a visual element, unless the figure, caption, or other major element is not available or cannot be processed by the person or device-type being addressed. The similarly non-visual element <long-desc> is meant for an extended description of the figure, table, etc.
<!ELEMENT alt-text (#PCDATA) >
Text, numbers, or special characters
<chem-struct> Chemical Structure (Display); <chem-struct-wrapper> Chemical Structure Wrapper; <disp-formula> Formula, Display; <fig> Figure; <graphic> Graphic; <inline-graphic> Graphic, Inline; <inline-supplementary-material> Inline Supplementary Material; <media> Media Object; <preformat> Preformatted Text; <supplementary-material> Supplementary Material; <table-wrap> Table Wrapper
...
<sec sec-type="results">
<title>Results</title>
<p>We identified 703 abstracts, of which 687 were not
relevant ... Details of randomisation procedures,
treatment schedules, and numbers of patients followed
up are given on the <italic>BMJ</italic> website.</p>
<fig id="F1">
<caption>
<p>Deaths among patients receiving day hospital care
or alternative services. Odds ratios of death by end
of follow up were calculated by fixed effects model.
Heterogeneity between trials is presented as
χ<sup>2</sup></p>
</caption>
<alt-text>Deaths in hospitals or with alternative services</alt-text>
<graphic xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="fors2662.f1" alt-version="yes">
<object-id>456472</object-id>
</graphic>
</fig>
...
</sec>
...
common.ent