The educational benefits of manipulation and alteration are recognized by this license and constrained only within the bounds of the academic tradition of proper citation and the moral rights of creators. Quotation, critique and alteration of texts and manipulation or alteration of images are permitted, if the use takes place within an educational context and purpose and the moral rights of artists and authors are respected. The results of such exercises should include explicit identification of what changes have been made to images and accompanying documentation and include citations and/or direct links to the unmodified copy.