<xs:element name="Index" type="eml:NonNegativeLong" minOccurs="1" maxOccurs="1"><xs:annotation><xs:documentation>The index of the time in the time series.</xs:documentation></xs:annotation></xs:element>
<xs:complexType name="TimeIndex"><xs:annotation><xs:documentation>Index into a time series. Used to specify time. (Not to be confused with time step.)</xs:documentation></xs:annotation><xs:sequence><xs:element name="Index" type="eml:NonNegativeLong" minOccurs="1" maxOccurs="1"><xs:annotation><xs:documentation>The index of the time in the time series.</xs:documentation></xs:annotation></xs:element><xs:element name="TimeSeries" type="eml:DataObjectReference" minOccurs="1" maxOccurs="1"/></xs:sequence></xs:complexType>