Could minimum level of information that a given collection may be able to provide vary according to local/regional laws? If so, it would be important to identify beforehand if any regions/countries would present any constraint or requirement on the information they can share and how they can share it, as part of understanding if the initiative could provide, at least in the majority of the cases, a usable product; and develop a contingency strategy for getting those more restricted on board as well without diminishing their value.