- <metadata name="author" brief="yes" termlist="yes" merge="longest" rank="2"/>
- <metadata name="subject" merge="unique" termlist="yes" rank="3"/>
+ <metadata name="author" brief="yes" termlist="yes" merge="longest" rank="2" mergekey="optional" />
+ <metadata name="subject" brief="yes" merge="unique" termlist="yes" rank="3"/>