source/turtlebot/turtlebot_description/robots/graveyard/turtlebot.urdf.xacro

<?xml version="1.0"?>

<robot name="turtlebot"  
       xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
       xmlns:xacro="http://ros.org/wiki/xacro">
  <include filename="$(find turtlebot_description)/urdf/graveyard/turtlebot_hardware.urdf.xacro" />
  <include filename="$(find turtlebot_description)/urdf/graveyard/turtlebot_body.urdf.xacro" />
  <include filename="$(find turtlebot_description)/urdf/graveyard/turtlebot_calibration.xacro" />
  <include filename="$(find turtlebot_description)/urdf/graveyard/turtlebot_kinect.urdf.xacro" />

  <property name="M_PI" value="3.14159"/>
  <property name="SCALE" value="0.0254"/>

  <!-- Body of TurtleBot, with plates, standoffs and Create (including sim sensors) -->
  <turtlebot_body/>
  
  <!-- Kinect frames and mounting (includes simulation) -->
  <turtlebot_kinect/>
</robot>