How to generate Java code from an XSD that includes MSFT Serialization: GUID datatypes?

<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:tns="http://schemas.datacontract.org/2004/07/MyMessagingTypes"
       xmlns:ser="http://schemas.microsoft.com/2003/10/Serialization/"
       elementFormDefault="qualified"
       xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:import namespace="http://schemas.microsoft.com/2003/10/Serialization/" />
  <xs:complexType name="MyMessage">
    <xs:sequence>
      ...
      <xs:element minOccurs="0" name="MyPlanID" type="ser:guid" />
      ...
    </xs:sequence>
  </xs:complexType>
  <xs:element name="MyMessage" nillable="true" type="tns:MyMessage" />
</xs:schema>