There is a new update to REP-0127. It is intended to be the final, approved replacement for the current draft. It specifies the package.xml file format currently used for catkin packages in Groovy and Hydro. Please review the update and submit comments, either by reply to this message or as comments on the pull request: https://github.com/ros-infrastructure/rep/pull/56 A formatted copy is available here: http://farnsworth.csres.utexas.edu/reps/rep-0127.html -- joq