chromium/tools/metrics/histograms/test_data/histogram_suffixes_list.xml

<histogram-configuration>

<histogram_suffixes_list>

<histogram_suffixes name="Test.EnumHistogramSuffixes" separator="."
    ordering="prefix,2">
  <suffix name="TestEnumSuffix" label="The enum histogram_suffixes"/>
  <affected-histogram name="Test.EnumHistogram"/>
</histogram_suffixes>

</histogram_suffixes_list>

</histogram-configuration>