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The last of these is visually confusing and results in invalid markup. It caused the creation of an embedded but improperly formed description list (the <dl> HTML element): it has a definition, indicated by : (in HTML that's <dd>), but no term (the missing ; element, which corresponds to HTML <dt>).
Markdown Extra is a lightweight markup language based on Markdown implemented in PHP (originally), Python and Ruby. [39] It adds the following features that are not available with regular Markdown: Markdown markup inside HTML blocks; Elements with id/class attribute "Fenced code blocks" that span multiple lines of code; Tables [40] Definition ...
This article lists the character entity references that are valid in HTML and XML documents. A character entity reference refers to the content of a named entity. An entity declaration is created in XML, SGML and HTML documents (before HTML5) by using the <!ENTITY name "value"> syntax in a Document type definition (DTD).
Generally, coding can be copied and pasted, without writing new code. There is a short list of markup and tips at Help:Cheatsheet. In addition to wikitext, some HTML elements are also allowed for presentation formatting. See Help:HTML in wikitext for information on this.
Multi-line block comments are opened with '#[' and closed with ']#'. Multi-line block comments can be nested. Nim also has documentation comments that use mixed Markdown and ReStructuredText markups. The inline documentation comments use '##' and multi-line block documentation comments are opened with '##[' and closed with ']##'.
A collapsible element contains a toggle a reader can use to show or hide the element's content. Elements are made collapsible by adding the mw-collapsible class, or alternatively by using the {} template, or its variants {{Collapse top}} and {{Collapse bottom}}.
In 1989, computer scientist Sir Tim Berners-Lee wrote a memo proposing an Internet-based hypertext system, [17] then specified HTML and wrote the browser and server software in the last part of 1990. The first publicly available description of HTML was a document called "HTML Tags", first mentioned on the Internet by Berners-Lee in late 1991.
This template uses the .hlist CSS class defined in MediaWiki:Common.css to generate horizontal lists. It causes ordinary html list items to be displayed inline (horizontally), where they would normally display as block elements (vertically). The class also generates the interpuncts between list items and parentheses around nested lists.