Provides buildtime and runtime dependencies for ROS messages.

* rosidl_core_generators brings together dependencies for generating and
  building code for ROS messages.
* rosidl_core_runtime brings together dependencies for using ROS messages at
  runtime.

For dependencies required for ROS services and ROS actions, you should depend
on ros2-rosidl-defaults.

Homepage:
https://github.com/rosidl_core/
