From 951e160eb4663c107d8fded04ae9695c32468fbc Mon Sep 17 00:00:00 2001
From: Bence Magyar <bence.magyar.robotics@gmail.com>
Date: Fri, 21 Oct 2022 22:50:40 +0100
Subject: [PATCH] Don't remove the link ref

---
 doc/controllers_index.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/controllers_index.rst b/doc/controllers_index.rst
index c658b26c95..dee9d31abe 100644
--- a/doc/controllers_index.rst
+++ b/doc/controllers_index.rst
@@ -20,6 +20,9 @@ The controllers' namespaces are commanding the following command interface types
   - ``effort_controllers``: ``hardware_interface::HW_IF_EFFORT``
   - ...
 
+.. _common hardware interface definitions: https://github.com/ros-controls/ros2_control/blob/master/hardware_interface/include/hardware_interface/types/hardware_interface_type_values.hpp
+
+
 
 Guidelines and Best Practices
 *****************************