Describe Datasource and Namespace better

From a solution point of view (Target), it is unclear what these two mean:

https://github.com/adobe/xdm/blob/master/schemas/context/namespace.schema.json
https://github.com/adobe/xdm/blob/master/schemas/data/datasource.schema.json

Given both are required, they need to be described better, with examples, with procedures on how to get them set up (if needed).

Thanks.