<executions>
  <execution>
    <phase>test-compile</phase>
    <goals>
      <goal>operation</goal>
    </goals>
    <configuration>
      <type>CLEAN_INSERT</type>
      <sources>
        <src>src/test/data/partOne.xml</src>
        <src>src/test/data/partTwo.xml</src>
      </sources>
      <composite>true</composite>
    </configuration>
  </execution>
  [...]
</executions>