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The alt attribute is used for short descriptions, with longer descriptions using the longdesc attribute. The standards organization for the World Wide Web, the World Wide Web Consortium (W3C), recommends that every image displayed through HTML have an alt attribute, though the alt attribute does not need to contain text. The lack of proper alt ...
Writing "|alt=" will cause the MediaWiki software to render HTML with an empty alt attribute in the img tag. When the image is a link, screen readers will read out the link filename (e.g., "slash green underscore tick") if the HTML alt attribute is empty or missing. Nearly all images in Wikipedia articles are links to the image description page ...
Text that provides the same essential information as an image in an article, provided by the alt attribute, image caption, and sometimes the body text. [6] Alt attribute The HTML attribute used on webpages to specify alternative text to be displayed in place of an element that cannot be rendered. [12] Alt parameter
This is rendered inline, and the specified text is used as the image's alt attribute (alternate text for programs which cannot display images, such as screen readers) and as the title attribute (supplementary text, often displayed as a tooltip when the mouse is over the image).
Also, if you add "alt=" to image markup, the screen reader acts as if you never specified the alt attribute. Graham 87 08:24, 21 March 2010 (UTC) For specifying no alt text the HTML syntax is alt="" or alt=" "(note the space), since MediaWiki will display the default alt text if it is empty or null we need to use |alt= (HTML escape code for a ...
For instance, in most HTML and XHTML document types the "type" attribute is required on the "script" element and the "alt" attribute is required for the "img" element.... This diagnostic can result from use of the EasyTimeline extension, which does not support accessibility and does not generate alternative text for visually impaired readers.
Images Whenever an image is linked, Google will use the "alt" attribute as the anchor text. Empty Whenever an image is linked, and the "alt" attribute is empty. Latent semantic indexing Latent semantic indexing (LSI) is a method used by Google to determine similar keywords.
An image description is a form of text-based description referring to the characteristics of an image. Alt text presents visual information via text (usually encoded in HTML code), primarily to aid blind people using screen readers so they may have access and interact with the visual.