Public Domain Dedication (based on United States law) from the Creative Commons http://creativecommons.org/licenses/publicdomain
The person or persons who have associated their work with this document (the "Dedicator") hereby dedicate the entire copyright in the work of authorship identified below (the "Work") to the public domain.
Dedicator makes this dedication for the benefit of the public at large and to the detriment of Dedicator's heirs and successors. Dedicator intends this dedication to be an overt act of relinquishment in perpetuity of all present and future rights under copyright law, whether vested or contingent, in the Work. Dedicator understands that such relinquishment of all rights includes the relinquishment of all rights to enforce (by lawsuit or otherwise) those copyrights in the Work.
Dedicator recognizes that, once placed in the public domain, the Work may be freely reproduced, distributed, transmitted, used, modified, built upon, or otherwise exploited by anyone for any purpose, commercial or non-commercial, and in any way, including by methods that have not yet been invented or conceived.
More info on the Public Domain