HTML restriction

MediaWiki restricts the use of HTML by default. Only some HTML elements and attributes are allowed. Raw-HTML sections, surrounded by the "html" tag, can be enabled with the option $wgRawHtml. The code is available at includes/Sanitizer.php.

The Wikimedia Foundation's website allows full use of HTML. Their other websites (see Complete list of Wikimedia projects) do not.

A request to allow full use of HTML was rejected.