 <xs:schema attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://schemas.microsoft.com/2003/10/Serialization/"
 xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://schemas.microsoft.com/2003/10/Serialization/">
      <xs:element name="duration" nillable="true" type="tns:duration"/>
         <xs:simpleType name="duration"><xs:restriction base="xs:duration">
             <xs:pattern value="\-?P(\d*D)?(T(\d*H)?(\d*M)?(\d*(\.\d*)?S)?)?"/>
             <xs:minInclusive value="-P10675199DT2H48M5.4775808S"/>
             <xs:maxInclusive value="P10675199DT2H48M5.4775807S"/>
         </xs:restriction>
     </xs:simpleType>
 </xs:schema>