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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 .
A screen reader will default to reading out the image filename when no alt text is available. [5] [6] The alt attribute can only contain plain text (no HTML or wiki markup such as wikilinks) without line breaks. The alt text is read by screen readers before the caption, so avoid duplicating the caption.
Requirements for providing text to act as an alternative for images – in the HTML 5 specification; Alt text, captions and titles for images, from the Australian Government Style Manual; How to write text descriptions (alt text) in BBC News articles; Altviewer tool [dead link ] for checking the alt text on an article
Zero or more of these options may be specified to control the alt text, link title, and caption for the image. Captions may contain embedded wiki markup, such as links or formatting. See Wikipedia:Captions for discussion of appropriate caption text. See Wikipedia:Alternative text for images for discussion of appropriate alt text. Internet ...
This guideline includes alt text for LaTeX-formatted equations in <math> mode. See Wikipedia:Manual of Style/Mathematics § Alt text. Do not insert images in headings; this includes icons and <math> markup. Doing so can break links to sections and cause other problems.
HTML is implied and should not be specified. PDF is auto-detected and should not be specified. Does not change the external link icon (except for PDF). Note: External link icons do not include alt text; thus, they do not add file format information for the visually impaired. (This is not a concern with PDF, because the auto-detection will add ...
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.
The {{colored link}} template takes two parameters to function: the color of the link, the article being linked to, with an optional third parameter for alternative text to display as a piped link. {{colored link|orange|Canada}} → Canada {{colored link|#00F000|Page name to link|Alternative text}} → Alternative text; Or