Is NDR Core a Database?
No. NDR Core is a data presentation system which requests and retrieves data over an API. NDR Core does not allow you to manipulate your data but to present it and to make it searchable by providing search forms.
How does NDR Core access my data?
Over an API. In order to use NDR Core, your data must be accessible to the server you install NDR Core on. The data must be stored in a form NDR Core has an API implementation for.
My DataSource is accessible over an API but NDR Core hasn't implemented it. What now?
You can implement it yourself. NDR Core's source is openly available and the documentation shows you how to implement APIs. Make sure you check the GutHub page first - we might be already on it!
Is NDR Core free?
Yes. NDR Core is freely available and open source. It must be installed on a server, so you'll likely have some web hosting cost.