The copyrights.txt file gathers the copyrights holders for Tiki at the current state of the software (depending the version). Each member of that list wrote at least one line, directly or indirectly, in Tiki code source. The exact proportion of the contribution of each is not an issue, as any copyright change will involve the agreement of everybody. This is how we implement the Social Contract.
The whole list of copyright holders is updated regularly in copyright.txt file released in each Tiki version.
Please see copyright.txt
Each code file written by Tiki developers should have the following header (the code comment syntax may differ):
# (c) Copyright by authors of the Tiki Wiki CMS Groupware Project # # All Rights Reserved. See copyright.txt for details and a complete list of authors. # Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.