I am really entusiastic about this idea!
Actually I will do this separately for now on my Site s-kmetij.si (“from farms”) for Slovenia (agen local as @tschumilas noted). Just for idea I describe here how I am composeing it:
It is WordPress with GeoDirectory plugin (it is one of many, but seems to have what I need). Basic is good operability of data: import/export categorising/tagging, searchability of data and represention on map (open street map).
For full operating system in this case one need payable addons. (GD = $150/y for all for unlimited installs).
OK, it may seem as advertisement, but I want to share what I learned and I think it is best way to start discussion with something as concrete as possible.
You can display on map any category (OFN, FoodAssembly, Organic, Manupacity…) separately.
Is there any functionality missing (except integration to OFN platform ;-)?
Eventually we could make local installs for countries and one global. And make interoperability in such way that as you zoom into country it loads local instalation.
Problem are border regions but that could be managed on local installs with dsta exchange protocols we anyway want to integrate.
And by this Open Food Directories we make traceability of individually traded foods (and goods) posible. Each enterprise get somekind of ID or number of which last three are to be defined by enterprise for product. (eg. US1234PROD123). So end shop can just specify that ID and buyers can see exactly where products come from (aditional numers for all of traders and shippers in between are also available and posiple aggregate in shipment trace).
What you think?