Licence for datasets in a R-package
On Mon, Jul 21, 2014 at 12:49 PM, Duncan Murdoch
<murdoch.duncan at gmail.com> wrote:
[...]
If you are not distributing the package to anyone else, you can ignore the warning about the bad license field. If you plan to distribute it on a public repository, you should ask the policies of the repository to find out what to do about this. CRAN policies are listed at http://cran.r-project.org/web/packages/policies.html. There's a link from there to the list of acceptable licenses, and it includes some CC licenses. If some parts of the package are licensed one way and others are licensed in another way, you'll probably need a COPYRIGHTS file to describe it.
In practice, CRAN maintainers do not allow multiple licenses for parts of the same package. At least they did not for my package a couple of months ago.
Other repositories (e.g. Bioconductor, Github) presumably have their own policies on this, but I don't know where to find those.
At Github, they do not care, you can do whatever you want (as long as it is legal, I guess). Gabor [...]