As an illustration of it: I have been working for two years on a new national project for the french state. Le Référentiel National des Bâtiments (for National Buildings Registry) which aim at creating and distributing a id key to every building in the country.

The goal is to make databases about buildings much more interoperable.

One key aspect is to have a precise list of all buildings includings recent constructions and demolition. It gets interesting because we recognize nobody in the country has the perfect list of buildings so we radically open the data to let governement agencies, cities, companies, citizens write directly in the registry. Think OSM or Wikipédia but for an official dataset.

This approach is very experimental for the french state and we are encouraged to test it and disseminate our learnings in other state branches.