Wikitext language or wiki markup is a lightweight markup language used to write pages in wiki websites, such as Wikipedia and Wikia wikis, and is a simplified alternative/intermediate to HTML. It includes some basic XHTML, like
<br />. It is to be converted by wiki software into HTML, which in turn is served to web browsers.
Different Wiki programs may support use of different sets of HTML elements within wikitext. In some cases, permitted HTML elements may be configured by individual wiki sites. MediaWiki supports many common HTML tags, but surprisingly does not support the usage of newer HTML5 elements.
For help with wiki markup, see Help:Wikitext.