JPA: Mapping Created and Updated Columns

To quickly follow up on my last post about CREATED and UPDATED columns for an entity named Map in MySQL, I thought I would add the equivalent JPA declarative ORM definition from my orm.xml:

  <entity class="Map" name="Map" access="FIELD">
    <table name="MAP"/>
    <attributes>
      <id name="id">
        <column name="ID" nullable="false"/>
        <generated-value strategy="SEQUENCE"/>
      </id>
      <basic name="updated">
         <column name="UPDATED" nullable="true"/>
         <temporal>DATETIME</temporal>
      </basic>
      <basic name="updated">
         <column name="UPDATED" nullable="true"/>
         <temporal>TIMESTAMP</temporal>
      </basic>
    </entity>