External Wiki feature is used to make linking to topics easier.

Here are some examples:
The string on the left are the wikilink shorthand. tw for tiki.org, dev for dev.tiki.org, wq for wikiquote, wd for wiktionary, lq for linuxquestions, wp for wikipedia.

tw   http://tiki.org/$page
dev   http://dev.tiki.org/$page
wq   http://en.wikiquote.org/wiki/$page
wd   http://en.wiktionary.org/wiki/$page
lq   http://wiki.linuxquestions.org/wiki/$page     
wp   http://en.wikipedia.org/wiki/$page

This way, you can make a link to that external wiki using the internal wiki double round brackets syntax with a prefix as "dev:" inside. For instance, to make a link to

http://dev.tiki.org/Download

you could use:

((dev:Download))

And it would produce this link:

Download

You can do that through the link at "Admin > External wikis", that will lead you to tiki-admin_external_wikis.php:

From the same tiki-admin_external_wikis.php you can see the list of external wiki references you already introduce them and edit or delete any of them. Below you can see, as a reference, the list of external wikis that we have defined in http://doc.tiki.org :

• How to indicate and visually distinguish certain external links

• Please see flash movie of config process

• External Wiki
• ExternalWiki
• ExternalWikis