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How do I escape this ampersand in the source XML? I tried &, but this is decoded as the actual ampersand character (&), which is invalid in HTML. So I want to escape it in such a way that it will be rendered as & in the web page that uses the XML output.
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In SGML, XML, and HTML, the ampersand is used to introduce an SGML entity, such as (for non-breaking space) or α (for the Greek letter α). The HTML and XML encoding for the ampersand character is the entity &. 40 This can create a problem known as delimiter collision when converting text into one of these markup languages.
An explanation of when to use encoded ampersands (&) in HTML and Javascript and when not to encode them.
Outputting HTML Code If you ever need to display HTML code to your users, you will probably find yourself having to use HTML character entities to get it to display correctly in the browser (i.e. without rendering). The ampersand is no exception. Here's an example of what is required in order to display the code required to output an ampersand symbol. Note that the amp; bit needs to be ...
So you should be replacing your ampersands with & when writing a URL in your markup. Note that replacing & with & is only done when writing the URL in HTML, where "&" is a special character (along with "<" and ">").
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In this snippet, you can see how to add and display different symbols, such as infinity ampersand and other symbols. For that, you need to use HTML Entities.
The HTTP protocol uses the MIME standard (RFC 1341) to specify the document type and character set. ISO SGML entity definitions are used to include characters which are missing from the character set or which would otherwise be confused with markup elements, e.g: & ampersand & < less than sign < > greater than sign > " the double ...
HTML Ampersand Character Codes These are character sequences that may appear in HTML documents; they represent sometimes useful symbols that are not part of the standard ASCII set or that would be difficult or impossible to type otherwise (e.g. the less-than sign, which would always be mistaken for the beginning of an HTML tag). Case is signinficant. The content of this table has been ...