mono/mcs/class/System.Data.ObjectSpaces/Test/SupportFiles/osd.xml

<osd:ExtendedObjectSchema Name="DataTypesOSD" xmlns:osd="http://schemas.microsoft.com/data/2002/09/20/persistenceschema">
  <osd:Classes>
    <osd:Class Name="Customer">
      <osd:Member Name="Id" Key="true" />
      <osd:Member Name="Company" />
      <osd:Member Name="Name" />
      <osd:Member Name="Phone" />
    </osd:Class>
  </osd:Classes>
</osd:ExtendedObjectSchema>