<Fooxmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><A>1</A><Bxsi:nil="true"/><!-- C has minOccurs="0" so we can skip it --><!-- <C>2</C> --><!-- D also has minOccurs="0" but we want to check if it detected the inner "nil" value --><Dxsi:nil="true"></D></Foo>