Most people will describe a framework as the “building blocks” of something. I see it more as the foundation and outer frame of a structure, if you’d like to use the building of a house as an analogy. There are a few rigid pieces (the foundation) that provide restrictions outside of which you are not prepared to go, and then some less rigid pieces (the frame) which provide more general guidelines that can change.
Follow the series for more information on building a framework in Azure Data Factory.