http://creativecommons.org/licenses/by/4.0/     

The Creative Commons Attribution 4.0 International License (CC BY 4.0) restricts the development of new data/products, so that a user can:

• copy, re-use, share and distribute the copies of the data

provided that, whenever the data are copied, re-used, or distributed the user ensures that:

• credit is given to the original sources/s of the data (and any other nominated parties) in the manner stipulated (Attribution);