I wonder if open and closed communities are more or less the same idea as that of closure of communities - see [1]. Specifically I wonder if we could define open communities as 'easy to enter', and closed as 'difficult to enter' by outsiders. Some more citations would be useful.--Piotr Konieczny aka Prokonsul Piotrus Talk 18:35, 15 April 2006 (UTC)
This concept which is defined only in [2] is a very narrow version of what the concept has become. The definition is now relevant and up to date but there are no references as wikipedia now holds the trademark/copyleft. --09:36, 19 Dec 2008 (UTC) —Preceding unsigned comment added by 206.169.203.29 (talk)