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The alt attribute is the HTML attribute used in HTML and XHTML documents to specify alternative text (alt text) that is to be displayed in place of an element that cannot be rendered. The alt attribute is used for short descriptions, with longer descriptions using the longdesc attribute .
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 Wikitext markup that generates the HTML alt attribute. [13] Alt text Text supplied for media's alt attribute or parameter. [14]
The nearby text is sufficient as the image's alternative text. A non-blank alt attribute results in repetitive text for screen readers and search engines. In both cases, a blank alt attribute is ideal. For public domain, CC0, or similarly licensed images, unlink the image and use a blank alt attribute: |link=|alt=. The combination of no link ...
Images and icons that are not purely decorative should include an alt attribute that acts as a substitute for the image for blind readers, search-spiders, and other non-visual users. If additional alt text is added, it should be succinct or refer the reader to the caption or adjacent text.
In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.
Standard attributes are also known as global attributes, and function with a large number of elements. [17] They include the basic standard attributes: these include accesskey, class, contenteditable, contextmenu, data, dir, hidden, id, lang, style, tabindex, title. There are also some experimental ones. Both xml:lang and xml:base have been ...
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.
Under Windows, the Alt key is pressed and held down while a decimal character code is entered on the numeric keypad; the Alt key is then released and the character appears. The numerical code corresponds to the character’s code point in the Windows 1252 code page, with a leading zero; for example, an en dash (–) is entered using Alt+0150 ...