The InterMap is a system for defining links between WikiWikiWeb sites that was first developed by UseMod:UseModWiki and Meatball:MeatballWiki. InterMap links have the form
PmWiki http://www.pmwiki.org/pmwiki2/pmwiki.php/ Cookbook http://www.pmwiki.org/pmwiki2/pmwiki.php/Cookbook/ Wiki http://www.c2.com/cgi/wiki? UseMod http://www.usemod.com/cgi-bin/wiki.pl? Meatball http://www.usemod.com/cgi-bin/mb.pl? Wikipedia http://www.wikipedia.com/wiki/ Path
Thus, PmWiki:Variables becomes a link to the PmWiki.Variables page on the official PmWiki web site, Wiki:FrontPage is a link to the front page of the first WikiWikiWeb, and Wikipedia:Stonehenge takes you to the Wikipedia article about the famous megaliths in England.