Namespace: http://schemas.microsoft.com/office/Excel/Server/WebServices/ExcelServerInternalService/

Specifies the visual representation for a slicer item.

 <xs:complexType name="SlicerItem" xmlns:xs="http://www.w3.org/2001/XMLSchema">
     <xs:element minOccurs="0" maxOccurs="1" name="DisplayName" type="xs:string"/>
     <xs:element minOccurs="0" maxOccurs="1" name="UniqueName" type="xs:string"/>
     <xs:element minOccurs="1" maxOccurs="1" name="Hidden" type="xs:boolean"/>
     <xs:element minOccurs="1" maxOccurs="1" name="NoData" type="xs:boolean"/>

DisplayName: Caption of the slicer item.

UniqueName: Unique name of the slicer item.

Hidden: If the slicer item is not selected, the value MUST be true. MUST be false otherwise.

NoData: MUST be true if there is no data for the slicer item. MUST be false otherwise.