<xsd:complexType name="WeightedAveragingObservation">
    <xsd:annotation>
        <xsd:documentation xml:lang="en">A single weighted averaging observation.</xsd:documentation>
    </xsd:annotation>
    <xsd:sequence>
        <xsd:choice minOccurs="0">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">Choice between date times for literal date values, and observation numbers for schedule generated observations.</xsd:documentation>
            </xsd:annotation>
            <xsd:element name="dateTime" type="xsd:dateTime">
                <xsd:annotation>
                    <xsd:documentation xml:lang="en">Observation date time, which should be used when literal observation dates are required.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
            <xsd:element name="observationNumber" type="xsd:positiveInteger">
                <xsd:annotation>
                    <xsd:documentation xml:lang="en">Observation number, which should be unique, within a series generated by a date schedule.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
        </xsd:choice>
        <xsd:element name="weight" type="NonNegativeDecimal" minOccurs="0">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">Observation weight, which is used as a multiplier for the observation value.</xsd:documentation>
            </xsd:annotation>
        </xsd:element>
    </xsd:sequence>
</xsd:complexType>

• WeightedAveragingObservation
• nsE:averagingObservation