A DataValue value is encoded as a xs:complexType with the following XML schema:

<xs:complexType name="DataValue">

<xs:sequence>

<xs:element name="Value" type="tns:Variant" minOccurs="0"

nillable="true" />

<xs:element name="StatusCode" type="tns:StatusCode"

minOccurs="0" />

<xs:element name="SourceTimestamp" type="xs:dateTime"

minOccurs="0" />

<xs:element name="SourcePicoseconds" type="xs:unsignedShort"

minOccurs="0"/>

<xs:element name="ServerTimestamp" type="xs:dateTime"

minOccurs="0" />

<xs:element name="ServerPicoseconds" type="xs:unsignedShort"

minOccurs="0"/>

</xs:sequence>

</xs:complexType>