Type: CSOM String
Specifies a reference to the field (2) that is used to render the Calendar View or Gantt view. If the view is a Calendar View or Gantt View, this section MUST be specified. For other view types, it MUST be ignored.
It MUST be
NULL or an XML fragment that
conforms to the following XML schema:
<xs:sequence><xs:element name="FieldRef" type="FieldRefDefinitionViewData" minOccurs="3" maxOccurs="5"/></xs:sequence>
where FieldRefDefinitionViewData is specified in [MS-WSSCAML] section 184.108.40.206.