From OpenStreetMap Wiki
license.txt, configuration file for PDF atlas
This file will be copied verbatim into the back page of the atlas. Lines need to be preformatted (restricted in length), and at the moment it can only accept simple text, e.g. ASCII.
Copyright © 2002-2006, OpenStreetMap contributors Creative Commons Attribution-ShareAlike 2.0 license You are free: * to copy, distribute, display, and perform the work * to make derivative works * to make commercial use of the work Under the following conditions: (1) Attribution: You must give the original author credit. (2) Share Alike: If you alter, transform, or build upon this work, you may distribute the resulting work only under a licence identical to this one. * For any reuse or distribution, you must make clear to others the licence terms of this work. * Any of these conditions can be waived if you get permission from the copyright holder. Your fair use and other rights are in no way affected by the above. This is a human-readable summary of the Legal Code (the full licence), which can be found at: http://creativecommons.org/licenses/by-sa/2.0/legalcode