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/usr/share/tf2/package.xml is in libtf2-dev 0.5.16-4.

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<package>
  <name>tf2</name>
  <version>0.5.16</version>
  <description>
    tf2 is the second generation of the transform library, which lets
    the user keep track of multiple coordinate frames over time. tf2
    maintains the relationship between coordinate frames in a tree
    structure buffered in time, and lets the user transform points,
    vectors, etc between any two coordinate frames at any desired
    point in time.
  </description>
  <author>Tully Foote</author>
  <author>Eitan Marder-Eppstein</author>
  <author>Wim Meeussen</author>
  <maintainer email="tfoote@osrfoundation.org">Tully Foote</maintainer>
  <license>BSD</license>

  <url type="website">http://www.ros.org/wiki/tf2</url>
    
  <buildtool_depend version_gte="0.5.68">catkin</buildtool_depend>

  <build_depend>libconsole-bridge-dev</build_depend>
  <build_depend>geometry_msgs</build_depend>
  <build_depend>rostime</build_depend>
  <build_depend>tf2_msgs</build_depend>

  <run_depend>libconsole-bridge-dev</run_depend>
  <run_depend>geometry_msgs</run_depend>
  <run_depend>rostime</run_depend>
  <run_depend>tf2_msgs</run_depend>

</package>