This is a new effort to get data out into the open for others to use. A data note can be on data that was not published or it could be an addendum describing data used in another publication. This is just getting started, but could end up being a great teaching resource.
Dirk Kruger. Get credit for your data – BMC Research Notes launches data notes. Research in Progress blog. September 29, 2017. Available at http://blogs.biomedcentral.com/bmcblog/2017/09/29/get-credit-for-your-data-bmc-research-notes-launches-data-notes/.