One reason to not move it to std_msgs is to keep the message packages consistent between ROS1 and ROS2. Otherwise you would have to convert any code using it to change package name and define custom mapping rules for the bridge. So I think it would be better to keep the layout as it is in ROS1. I'd wait for feedback from the ROS team before going through the work of making the PR --- [Visit Topic](https://discourse.ros.org/t/uuid-in-std-msgs/1941/5) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: