Hi Hardy, nice post on the release, this should get started everyone with 4.3. And we can finally focus on HV 5 :) I've created a branch for method validation [1], bumped the dependency to the BV API to 1.1.Alpha1 and applied the minimal changes required to get rid of any compilation errors (added UnsupportedOperationExceptions within the new methods). I've also added "TODO HV-571" markers everywhere, so we can't forget everything :) Regarding the actual implementation, I think there are two large blocks, which might be addressed in parallel: a) implementing the new validation methods and b) implementing the extensions to the meta data API (plus some other things such as changes to ConfigurationImpl etc.). If we decide to work on this in parallel, we might push the HV-571 feature branch to the upstream repo, integrate the method validation work there and push it later on in one go to master. WDYT, would that make sense? --Gunnar [1] https://github.com/gunnarmorling/hibernate-validator/compare/HV-571