<bio>

Appears in	Frequency
<contrib>	Zero or more times

Author biography.

Example:

...
<contrib-group content-type="author">
  ...
  <contrib contrib-type="person">
    ...
    <name>
      <surname>Cabot</surname>
      <given-names>John</given-names>
    </name>
    <bio>
      <p>John Doe is the head of the department of ...</p>
    </bio>
    <email>john@cabot.org</email>
    ...
  </contrib>
  ...
</contrib-group>
..