Each part of the structure in "addon structure" (addons/versions/files/) needs a unique id.
Also there should be "special" unique id's that points always to the latest version/latest stable version/latest stable version for x64 in unicode etc...
- specify the format of unique id's
- needs agreement with the "versioning idea"
- feedback required if that is a good structure for a new updater plugin
- some unique fields are still missing in the database model
- a lot of more?! :)