Unsure why we have two that do the same thing. We should combine them into one (including combining their unit tests). ComparableVersion (which is in the util module) OSGiVersion (which is in the domain module) We need one in the domain because, I think, it is used by GWT clients. Unsure if we need one on util (most things that have access to util also have access to domain). This means we could combine into the domain module. Again, make sure all unit tests are copied as well.