• Mediawiki automatically handles versioning for uploads. So perhaps the .draw, .gif, and .map files can simply be uploaded that way. Of course, there is no way of ensuring atomicity for those three files getting changed at the same time, but I think that's probably okay for the first iteration.
  • Ideally versioning would be independant of the particular wiki implementation, but perhaps it could be handed off to if available. With regards to 'atomicity' , since the .map + .gif are constructed from the .draw, there is no need to version them as they can *always* be re-generated from the original .draw file, which is handy :)

Existing Tools

• server-side svg rendering

• Mediawiki has 'external editor' - a browser-launched helper application that runs based on a 'control file'.

• installation: unzip into extensions folder, source in config.php