The duplicate finder plugin can write its results to a file to allow other tools to pick up and post-process them.

<configuration>
  <useResultFile>true</useResultFile>
  <resultFile>${project.build.directory}/duplicate-finder-result.xml</resultFile>
  <resultFileMinClasspathCount>2</resultFileMinClasspathCount>
</configuration>

There are a number of flags controlling the generation of the result file.

The format of the result file [is documented here](Result file format).