Feature summary (what you would like to be able to do and where):
The chart should have a link back to the source data file on Commons.
Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
This would make it a lot easier to fix typos and other errors. Now one has to enter editing mode and copy the file name, got to Commons and paste it.
It would also follow the same attribution praxis as we have for images (if the data has a license requiring attribution).
Benefits (why should this be implemented?):
Mostly for usability and being a good role model on verifiability and attribution, and perhaps also for legal reasons.
