11. The computer program product of claim 10 , wherein the program code executable by the processor to include the information on any subtype of the second entity in the XSD further comprises: recursively include information on any subtype entity of the subtype entity in the XSD.
10. The computer program product of claim 9 , wherein the program code executable by the processor to generate the XSD for the XML column comprises: include information on the second entity in the XSD; include information on any subtype entity of the second entity in the XSD; include information on any supertype entity of the second entity in the XSD; and include information on any child entity of a relationship referencing the second entity as parent in the XSD.