I've googled this question, and know:
The National Airspace System Resource (NASR) System provides the Federal Aviation Administration (FAA) with the means for storing and maintaining a reference database with descriptive details of the National Airspace System's (NAS's) infrastructure and the operational status of all components
But what I'm asking is, what does that mean? Is this where companies like AirNav, Jeppesen, and foreflight get their data? When I update my foreflight database, is it downloading new charts and nav data from NASR, or am I misunderstanding the above quote?
Also, related, when Jeppesen makes their own charts, updates them, etc. are they getting their data from NASR, or somewhere else?