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& is the way to represent an ampersand in most sections of an XML document. If you want to have XML displayed within HTML, you need to first create properly encoded XML (which involves changing & to &) and then use that to create properly encoded HTML (which involves again changing & to &). That results in: &
So an actual & got an & escape sequence to render an actual & because early parsers couldn't know if the & was the start of an escape sequence or just a literal &. There are many, many more. So when automated escapers and descapers do their thing with inputs and outputs, they sometimes screw up and will escape **&**amp; as **&**amp ...
Failure to do so can lead to parsing errors or invalid XML. XML parsers interpret entity references to restore the original characters. Using the "&" entity reference ensures that the ampersand is rendered correctly and not mistakenly interpreted as an entity or tag. Syntax: &
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When you see these special strings, a mistake has happened in the code of the website. It may have converted a character twice. & -> & -> & When the browser receives the string "&", it performs the task of restoring the complete "entity" in the first 5 characters, resulting in "&" being output.
If you want one to appear in text on a web page you should use the encoded named entity "&"—more technical mumbo-jumbo at w3c.org. While most web browsers will let you get away without encoding them, stuff can get dicey in weird edge cases and fail completely in XML.
volt & amp > In that case don't bother encoding it. It is not isolated, but you feel it is nonetheless unambiguous, as the resulting entity does not exist and will never exist since the entity list could never evolve. E.g., amp&volt >. In that case, don't bother encoding it. It is not isolated, and ambiguous. E.g., volt& > Encode it.??
The & character is special in HTML because it starts a number of codes known as HTML Entities. To represent this special character, when writing HTML, you write & and the browser displays it as &.. If this or other HTML Entities are visible, that could indicate that the script or software which generates the page did not fully/properly decode whatever its data source is back to final form.
Authors should use & (ASCII decimal 38) instead of "&" to avoid confusion with the beginning of a character reference (entity reference open delimiter). Share. Improve this answer. Follow answered Jun 30, 2011 at 11:47. John Conde ♦ John ...
This page contains HTML code for adding an ampersand within the text of your website or blog. An ampersand (sometimes referred to as the "and" symbol) is a special character that requires special coding when being used on a website or blog.. To display the ampersand symbol, you can use either the HTML entity number or the entity name.. HTML Entity Number