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Filename extension icons are displayed only if the extension matches the text. Filename extension icons have precedence over URI scheme icons. Internet Explorer may show an empty space or misplaced icon if the page is rendered with a line wrap inside the link text. Link icons do not adhere to accessibility standards, since alt text cannot be added.
The second is a link to the article that details that symbol, using its Unicode standard name or common alias. (Holding the mouse pointer on the hyperlink will pop up a summary of the symbol's function.); The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it;
Cascading Style Sheets (CSS) is a style sheet language used for specifying the presentation and styling of a document written in a markup language such as HTML or XML (including XML dialects such as SVG, MathML or XHTML). [2] CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript. [3]
When used in mathematical context it is recommended to consistently use style markup for superscripts and subscripts […] However, when super and sub-scripts are to reflect semantic distinctions, it is easier to work with these meanings encoded in text rather than markup, for example, in phonetic or phonemic transcription. [2]
Among the fonts in widespread use, [6] [7] full implementation is provided by Segoe UI Symbol and significant partial implementation of this range is provided by Arial Unicode MS and Lucida Sans Unicode, which include coverage for 83% (80 out of 96) and 82% (79 out of 96) of the symbols, respectively.
The Unicode Standard states that "The universe of symbols is rich and open-ended," but that in order to be considered, a symbol must have a "demonstrated need or strong desire to exchange in plain text." [1] This makes the issue of what symbols to encode and how symbols should be encoded more complicated than the issues surrounding writing ...
Failure to provide this alt text will often make the icon meaningless or confusing to those using screen readers or text-only browsers. To provide alt text, simply add the description to the end of the image markup : for example, " [[File:Commons-logo.svg|30x30px|link=Commons:Special:Search|Search Wikimedia Commons]] " generates an icon that ...
Hazard symbols; List of mathematical constants (typically letters and compound symbols) Glossary of mathematical symbols; List of physical constants (typically letters and compound symbols) List of common physics notations (typically letters used as variable names in equations) Rod of Asclepius / Caduceus as a symbol of medicine