[quote="facontidavide, post:7, topic:3393"] A) I guess that the first step is to add to ROSIDL the equivalent of ros::message_traits::Definition< Type >::value(). Preferably expressed as JSON or XML format. [/quote] I assume the value should contain the message description in a readable format. Why should that be provided through a language specific symbol? I would suggest to provide this information through the ament resource index which would make it available across languages. --- [Visit Topic](https://discourse.ros.org/t/ros2-anything-equivalent-to-topic-tools-shapeshifter/3393/8) 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: