Editing Help:Interwiki linking (section)

==Interwiki links to other projects==
===Default===
Several Wikimedia-Projects (and others) are ready for interwiki linking by default, so you can use them without editing your database. However, the mother of all Wikimedia-projects &mdash; the Wikipedia itself &mdash; is for some reason missing.
{| {{prettytable}}
|{{Hl3}} align="center"|'''prefix'''
|{{Hl3}} align="center"|'''direction'''
|{{Hl3}} align="center"|'''usage example'''
|-
|commons
|<nowiki>http://commons.wikimedia.org/wiki/</nowiki>
|<code><nowiki>[[commons:MediaWiki]]</nowiki></code>
|-
|mediazilla
|<nowiki>http://bugzilla.wikipedia.org/</nowiki>
|<code><nowiki>[[mediazilla:1209]]</nowiki></code>
|-
|meta
|<nowiki>http://meta.wikimedia.org/wiki/</nowiki>
|<code><nowiki>[[meta:Main Page]]</nowiki></code>
|-
|mw
|<nowiki>http://www.mediawiki.org/wiki/</nowiki>
|<code><nowiki>[[mw:Help:Contents]]</nowiki></code>
|-
|wikibooks
|<nowiki>http://en.wikibooks.org/wiki/</nowiki>
|<code><nowiki>[[wikibooks:Main Page]]</nowiki></code>
|-
|wikimedia
|<nowiki>http://wikimediafoundation.org/wiki/</nowiki>
|<code><nowiki>[[wikimedia:Main Page]]</nowiki></code>
|-
|wikinews
|<nowiki>http://en.wikinews.org/wiki/</nowiki>
|<code><nowiki>[[wikinews:Main Page]]</nowiki></code>
|-
|wikiquote
|<nowiki>http://en.wikiquote.org/wiki/</nowiki>
|<code><nowiki>[[wikiquote:Main Page]]</nowiki></code>
|-
|wikisource
|<nowiki>http://sources.wikipedia.org/wiki/</nowiki>
|<code><nowiki>[[wikisource:Main Page]]</nowiki></code>
|-
|wikispecies
|<nowiki>http://species.wikipedia.org/wiki/</nowiki>
|<code><nowiki>[[wikispecies:Main Page]]</nowiki></code>
|-
|wiktionary
|<nowiki>http://en.wiktionary.org/wiki/</nowiki>
|<code>  <nowiki>[[wiktionary:Main Page]]</nowiki></code>
|-
|}

===Adding more===
As the Wikipedia isn't set up by default, you might want to add it (and other projects of your need).

You have to edit your own database. 
Go to table <code>interwiki</code> and add a new line:
*'''<code>iw_prefix</code>''': choose a prefix, which is used for interwiki linking, e.g. "Wikipedia" or "wp" for linking to Wikipedia
*'''<code>iw_url</code>''': enter the project's URL, e.g. <code><nowiki>http://en.wikipedia.org/wiki/$1</nowiki></code> for Wikipedia. Don't forget the <code>$1</code> as it is replaced with the article's name you are linking to (<code><nowiki>[[Wikipedia:Main Page]]</nowiki></code> links to <code><nowiki>http://en.wikipedia.org/wiki/</nowiki>'''Main_Page'''</code>).
*'''<code>iw_local</code>''': if 1, your wiki will redirect even external links of the form iw_prefix:title, not only those from its own pages. you need this if you want to use the redirect functionality from outside your wiki or other wikis use your transwiki functions for nested transwiki links (like http://en.wikipedia.org/wiki/fr:Accueil)
*'''<code>iw_trans</code>''': "transwiki transclusion" - set to 1 if you want to use pages from the other wiki as templates.  You will also need to set ''$wgEnableScaryTranscluding = true'' in your ''LocalSettings.php''

{{admin tip|tip=
Several help pages link to MediaWiki.org's ''Manual'' namespace.  To make these links work on your local wiki, add an interwiki link with ''iw_prefix=manual'' and ''iw_url=http://www.mediawiki.org/wiki/Manual:$1''
}}