Here is a list of all namespaces with brief descriptions:

[detail level 12]

Ncl_http
Ncl_keyboard
Ncl_lifecyclenode
Ncl_moveit2z
Ncl_multirole_sensor
▼Ncl_nav2z
Nbackward_global_planner
Nbackward_local_planner
Nforward_global_planner
Nforward_local_planner
Nodom_tracker
Npure_spinning_local_planner
Nundo_path_global_planner
Ncl_ros_publisher
Ncl_ros_timer
▼Nsmacc2
Nclient_bases
Nclient_behaviors
Ncomponents
Ndefault_events
Ndefault_transition_tags
Nevent_generators
Nintrospection
Nstate_reactors
Nutils