<object name="vistrail">
  <layout>
    <xml name="visTrail" nodeType="xs:element"/>
  </layout>
  
  <property name="version" type="str" primaryKey="true">
    <xml nodeType="xs:attribute" type="xs:string"/>
  </property>

  <property ref="true" object="action" type="hash" mapping="one-to-many">
    <xml nodeType="xs:element"/>
  </property>

  <property ref="true" object="tag" type="hash" mapping="one-to-many">
    <xml nodeType="xs:element"/>
  </property>
</object>
