Interwiki links are shortcodes for linking to other wikis. The extension InterWikiLinks allows creating abbreviations for various external wikis. The full URL only needs to be known when the interwiki link is defined and not every time it is used.
Interwiki links are managed from the page Special:InterwikiLinks. It can be loaded from the navigation item Global actions > Management > Interwiki links.
While all users with edit permissions can see this page, a user needs administrative rights to edit the interwiki links:
Admins can create and delete Interwikilinks with the Interwiki links manager. Existing links can be edited by clicking the "wrench" icon when the link is selected or deleted by clicking the "X" button.
The syntax for interwiki links is:
$1 is the placeholder for the article title of the other wiki.
In edit mode, links to other wikis are added just like links to local wiki pages, but with the interwiki prefix at the beginning.
The URL to the Wikipedia article "Tree house" is:
Wikipedia is a default entry in the Interwiki link manager:
prefix: wikipedia, url: https://en.wikipedia.org/wiki/$1
As a result, a link to any wikipedia page can be inserted by using the wikipedia prefix.
[[wikipedia:Tree_house|Wikipedia article about tree houses]]
Special use case: multilingualism
If you want to maintain multiple language versions of your wiki on separate wikis, you can use interwiki links to cross-reference related pages.
With BlueSpice, flag symbols are automatically inserted when the interwiki links with language abbreviations are set.
Linking the language versions:
- Create interwiki links for the required languages and configure them in the Interwiki link manager (see above) of all language sites. The prefix must always be an ISO-3166 country code, e.g. de, en, fr.
- Add the interwiki links at the bottom of the related pages to create the language switch. Example: In the English article "Tree", insert the following interwiki links:
The result of setting the first link is that the English flag will be shown in the language selection of the page header toolbar. This is not necessary and can also be omitted. The second link connects the page with the related german page "Baum" in the German wiki and generates the German flag as a switch in the header toolbar:
To view a list of all pages on a wiki that don't have interwiki links, an administator can review the page Special:WithoutInterwiki.