<xsd:element name="timeInterval">
  <xsd:annotation>
    <xsd:documentation>
      <type>Element</type>
      <name>timeInterval</name>
      <comment>The element timeInterval contains all the data needed to identify a specific time interval. It is built either with two dates or with a date and a duration (exactly two of the 'start', 'end' and 'duration' attributes can be specified). Values of the 'start' and 'end' attributes are NOT dates, but references to event elements in the corresponding metadata section. The refers attribute is a reference to a temporal concept belonging to the Akoma Ntoso ontology and specified in the references section</comment>
    </xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:complexContent>
      <xsd:extension base="metaopt">
        <xsd:attributeGroup ref="interval"/>
        <xsd:attributeGroup ref="duration"/>
        <xsd:attributeGroup ref="refersreq"/>
      </xsd:extension>
    </xsd:complexContent>
  </xsd:complexType>
</xsd:element>