5.10 http://schemas.microsoft.com/office/drawing/2007/8/2/chart Schema

 <xsd:schema targetNamespace="http://schemas.microsoft.com/office/drawing/2007/8/2/chart" elementFormDefault="qualified" attributeFormDefault="unqualified" xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.microsoft.com/office/drawing/2007/8/2/chart" blockDefault="#all" xmlns:cdr="http://schemas.openxmlformats.org/drawingml/2006/chartDrawing" xmlns:c="http://schemas.openxmlformats.org/drawingml/2006/chart">
   <xsd:import schemaLocation="oartspproperties.xsd" namespace="http://schemas.openxmlformats.org/drawingml/2006/main"/>
   <xsd:import schemaLocation="oartstylesheet.xsd" namespace="http://schemas.openxmlformats.org/drawingml/2006/main"/>
   <xsd:import schemaLocation="oarttx.xsd" namespace="http://schemas.openxmlformats.org/drawingml/2006/main"/>
   <xsd:import schemaLocation="orel.xsd" namespace="http://schemas.openxmlformats.org/officeDocument/2006/relationships"/>
   <xsd:import schemaLocation="ChartDrawing.xsd" namespace="http://schemas.openxmlformats.org/drawingml/2006/chartDrawing"/>
   <xsd:import schemaLocation="Chart.xsd" namespace="http://schemas.openxmlformats.org/drawingml/2006/chart"/>
   <xsd:complexType name="CT_BooleanTrue">
     <xsd:attribute name="val" type="xsd:boolean" use="optional" default="true"/>
   </xsd:complexType>
   <xsd:complexType name="CT_BooleanFalse">
     <xsd:attribute name="val" type="xsd:boolean" use="optional" default="false"/>
   </xsd:complexType>
   <xsd:complexType name="CT_InvertSolidFillFmt">
     <xsd:sequence>
       <xsd:element name="spPr" type="a:CT_ShapeProperties" minOccurs="1" maxOccurs="1"/>
     </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="CT_PivotOptions">
     <xsd:sequence>
       <xsd:element name="dropZoneFilter" type="CT_BooleanFalse" minOccurs="0" maxOccurs="1"/>
       <xsd:element name="dropZoneCategories" type="CT_BooleanFalse" minOccurs="0" maxOccurs="1"/>
       <xsd:element name="dropZoneData" type="CT_BooleanFalse" minOccurs="0" maxOccurs="1"/>
       <xsd:element name="dropZoneSeries" type="CT_BooleanFalse" minOccurs="0" maxOccurs="1"/>
       <xsd:element name="dropZonesVisible" type="CT_BooleanFalse" minOccurs="0" maxOccurs="1"/>
     </xsd:sequence>
   </xsd:complexType>
   <xsd:simpleType name="ST_Style">
     <xsd:restriction base="xsd:unsignedByte">
       <xsd:minInclusive value="101"/>
       <xsd:maxInclusive value="148"/>
     </xsd:restriction>
   </xsd:simpleType>
   <xsd:complexType name="CT_Style">
     <xsd:attribute name="val" type="ST_Style" use="required"/>
   </xsd:complexType>
   <xsd:element name="pivotOptions" type="CT_PivotOptions"/>
   <xsd:element name="invertSolidFillFmt" type="CT_InvertSolidFillFmt"/>
   <xsd:element name="style" type="CT_Style"/>
 </xsd:schema>