[WikiEN-l] Nofollow and sister projects

[Charles Matthews]

I was trying to follow the nofollow discussion 
(http://meta.wikimedia.org/wiki/Nofollow#Current_use_on_Wikimedia_projects). 
I see it hinges on "external links", and my question about it would be 
concerning when an interwiki link to a sister project is deemed 
"external". For context, I use many links to Wikisource pages I have 
created as references, and was wondering whether the [[:s: ***]] 
construction is read as an "external" link.

Charles