Open licensing ??? as with the Creative Commons license used by Open Medicine (see <a href="http://creativecommons.org/licenses/by-nc-sa/2.5/ca/)">http://creativecommons.org/licenses/by-nc-sa/2.5/ca/)</a> ??? is one way of dealing with issues such as intellectual property rights, allowing those who provide the original data to retain control over what others do with their work.3 Creative Commons and the affiliated Science Commons Project are working hard to identi