Help links – mediawiki gas quality by brand

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To create Help:Editing pages a so-called internal link to a page on the same wiki (a "wikilink"), use double square brackets wiki markup, [[like this]]. When you preview or save your changes, you will see a link that can be followed to the target page. If the page exists the link is displayed in blue (like the word "create" in the first sentence of this paragraph); if the page does not exist, the link appears red (so the [[like this]] link is actually rendered like this). Note that the colors could be different if the color scheme of the wiki has been changed from the default. Following such a "redlink" to a missing page (whether or not it is actually red) will usually enable the user to create the page.

The first letter of the link target is usually case-insensitive (unless the wiki is configured otherwise), meaning links can be capitalized or not (so How to contribute and how to contribute are equivalent). However, the case of every subsequent letter must match the target page exactly (so How to contribute and How To Contribute are not equivalent). Spaces in the page title may be represented as underscores (so How to contribute and How_to_contribute are again equivalent), but using underscores in links will make them visible in the page text (but this can be prevented by using a "pipe").

If the page title you are linking to is that of the page you are editing, the result is not a hyperlink at all but simply bold text (for example, on this page the markup [[Help:Links]] gives the result Help:Links). If you’re trying to create a wikilink to the current page, you probably want to link to a specific section or to an anchor within the page; see the examples below.

To create an external link, usually to a page at a different website, enclose the URL followed by space and the link text in single square brackets (see examples below). When you save or preview the page, you will see a link rendered slightly differently than an internal wikilink. It may be a different color and/or be followed by an arrow icon to show that it may lead to another site.

Some MediaWiki installations are set up to use special icons to denote external links to specific file types or using specific protocols. None of these special icons are enabled here on MediaWiki.org, but we present them here for the sake of completeness.

Interwiki links are internal-style links to other websites (which do not have to be wikis, despite the name). For example, you can link to the article http://en.wikipedia.org/wiki/Sunflower by typing [[wikipedia:Sunflower]] or, on this wiki, the shorter [[w:Sunflower]]. Both will result in a link wikipedia:Sunflower. This works because by default MediaWiki configures wikipedia: as an "interwiki prefix" that turns into http://en.wikipedia.org/wiki/ when used inside [[ ]]. ( It may not work if the admin of your wiki has changed the setting.) Unlike internal links, interwiki links do not use page existence detection, so an interwiki link will appear blue even if the page does not exist on the remote wiki.

In wiki markup an interlanguage link looks very much like an interwiki link, but behaves similarly to a category link in that it is rendered in a special way. While category links appear in a special list at the bottom of the page (usually), interlanguage links appear in a special list in the sidebar of the page (or elsewhere, depending on the wiki’s configuration and the skin used).

The purpose of interlanguage links is to link pages on the same topics in different languages. To create an interlanguage link, type [[ language prefix: page name]] anywhere in the page (preferably at the bottom, like category links); the language prefix is the prefix specified at your wiki for the other language version (typically the ISO 639-1 language code).