Wiki syntax is a markup language that is used to format text on websites (usually belonging to the class of wiki projects) and allows you to simplify access to the capabilities of the HTML language. Pages, designed using wiki markup, are pre-converted to HTML for viewing in a web browser, the conversion is implemented by special software - wiki software (wiki engine).

Various wiki markup languages do not have a generally accepted standard and are incompatible with each other. The wikibook site ESL.Wiki runs on the DokuWiki engine and uses the appropriate kind of markup. The basics of DokuWiki markup can be found on the page "Basic formatting constructs".

For the editing rules and restrictions, please see the "Editing Policy" page.