You can submit data to be included in the data repository going to File > New > Data Resource.
Alternatively you can see this Stack Exchange article which covers how to do this: https://mathematica.stackexchange.com/questions/143618/adding-computer-vision-datasets/144126#144126
I wouldn't worry about it. They don't really differ that much except in how to bring up the notebook that you fill-out and submit.
If you have any questions about any of the fields, please let us know.
Hi Sean, is there any difference between method suggested by MSE and by Stephen Wolfram in his blog:
http://blog.wolfram.com/2017/04/20/launching-the-wolfram-data-repository-data-publishing-that-really-works
