[debacle]

My concern for the potential for abuse in this project is much greater than that of wikipedia. How is wikimedia going to ensure that there are no malicious edits to this data? Any changes will almost certainly need stringent peer review.

Edit: As an afterthought, it would make a lot of sense to manage it like a git repository, where someone could submit a pull request for data changes, and then some subgroup or a trusted percentage of the population approves the request and it gets merged into the master dataset.

[femto]

Given that the data is structured, to some extent it should be possible to automatically check its consistency.

[john61]

Openstreetmap has the same problem and it handles it well.