Original Schema:

<?xml version="1.0" encoding="utf-16"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="Orders">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="OrderID" type="xs:string" />
        <xs:element name="CustomerID" type="xs:string" />
        <xs:element name="EmployeeID" type="xs:string" />
        <xs:element name="OrderDate" type="xs:string" />
        <xs:element name="RequiredDate" type="xs:string" />
        <xs:element name="ShippedDate" type="xs:string" />
        <xs:element name="ShipVia" type="xs:string" />
        <xs:element name="Freight" type="xs:string" />
        <xs:element name="ShipName" type="xs:string" />
        <xs:element name="ShipAddress" type="xs:string" />
        <xs:element name="ShipCity" type="xs:string" />
        <xs:element name="ShipPostalCode" type="xs:string" />
        <xs:element name="ShipCountry" type="xs:string" />
        <xs:element name="ShipRegion" type="xs:string" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

Modified Schema:
<?xml version="1.0" encoding="utf-16"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="Orders"> <xs:complexType> <xs:sequence> <xs:element name="OrderID" type="xs:string" /> <xs:element name="CustomerID" type="xs:string" /> <xs:element name="EmployeeID" type="xs:string" /> <xs:element name="OrderDate" type="xs:string" /> <xs:element name="RequiredDate" type="xs:string" /> <xs:element name="ShippedDate"> <xs:simpleType> <xs:restriction base="xs:date"> <xs:minInclusive value="2002-04-15" /> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="ShipVia" type="xs:string" /> <xs:element name="Freight" type="xs:string" /> <xs:element name="ShipName" type="xs:string" /> <xs:element name="ShipAddress" type="xs:string" /> <xs:element name="ShipCity" type="xs:string" /> <xs:element name="ShipPostalCode" type="xs:string" /> <xs:element name="ShipCountry" type="xs:string" /> <xs:element name="ShipRegion" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:element> </xs:schema>