Within the CEDAR project, iterative development cycles we refer to as miniprojects have been established to study, correct, harmonize and publish the Dutch historical censuses (1795-1971) in a constrained scale environment.
The second of these iterations is coming to its end, and we have written down what we have achieved and what still needs to be solved. You can find the technical report here (PDF version) or here (read-only Google Doc), as well as in the publications page.