<xsd:attributeGroup name="interval">
  <xsd:annotation>
    <xsd:documentation>
      <type>Attlist</type>
      <name>interval</name>
      <comment>The start and end attributes are used to specify events that mark the beginning and the end of a time interval. Both are references to eventRef elements in the lifecycle element</comment>
    </xsd:documentation>
  </xsd:annotation>
  <xsd:attribute name="start" type="eventRefRef"/>
  <xsd:attribute name="end" type="eventRefRef"/>
</xsd:attributeGroup> |