The ROS Wiki is for ROS 1. Are you using ROS 2 (Dashing/Foxy/Rolling)? Check out the ROS 2 Documentation
Tutorials for OMPL can be found on the tutorials page.
If you are working with a robot, tutorials for integrating OMPL with your robot can be found in the ompl_ros_interface package tutorials.
Wiki: ompl/Tutorials (last edited 2011-05-25 22:38:59 by SachinChitta)