PIVOT node | GameDev.net

Hy . What is pivot node in collada? I'm creating a collada importer and now i'm at sene import ,then i must rotate ,scalate and translate for each node, but in my parser i "meet" the PIVOT node , what is? this is an example:


  <node id="rear_lights-node" name="rear_lights" type="NODE">
        <translate>0.457656 1.53983 0.431033</translate>
        <rotate>0 0.707107 0.707107 -180</rotate>
        <node id="rear_lights-node_PIVOT" name="rear_lights_PIVOT" type="NODE">
          <matrix>1 0 0 0 0 1 0 0 0 0 1 -0.063738 0 0 0 1</matrix>
          <instance_geometry url="#rear_lights-mesh">
            <bind_material>
              <technique_common>
                <instance_material symbol="ColorMaterial" target="#ColorMaterial_B01A1A00"/>
              </technique_common>
            </bind_material>
          </instance_geometry>
        </node>
      </node>

The problem is that the material instance for the node is enclosed in pivot,then how do my parser when meet the pivot node? Thanks.

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