[Serialization] IBM-SE-014: Serializing the "nilled" property

The Serialization document says nothing about how the "nilled" property of 
an element node is serialized. Does this property always result in an 
xsi:nil attribute on the generated element? Does this process depend on 
anything (for example, the type of the element and/or whether it is 
"nillable")?

--Don Chamberlin