5.9 http://schemas.microsoft.com/office/spreadsheetml/2010/11/ac Schema

 <xsd:schema targetNamespace="http://schemas.microsoft.com/office/spreadsheetml/2010/11/ac" elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:x="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns="http://schemas.microsoft.com/office/spreadsheetml/2010/11/ac">
   <xsd:import namespace="http://schemas.openxmlformats.org/officeDocument/2006/relationships" schemaLocation="orel.xsd"/>
   <xsd:import namespace="http://schemas.openxmlformats.org/spreadsheetml/2006/main" schemaLocation="xlbasictypes.xsd"/>
   <xsd:complexType name="CT_AbsolutePath">
     <xsd:attribute name="url" use="required" type="x:ST_Xstring"/>
   </xsd:complexType>
   <xsd:element name="absPath" type="CT_AbsolutePath"/>
 </xsd:schema>