[Serialization] IBM-SE-008: Serializing namespace nodes

Serialization Section 4, "XML Output Method": This section should specify 
the rules for serializing namespace nodes in the form of namespace 
declaration attributes. Does every namespace node attached to an element 
node result in an xmlns-attribute in that element's start-tag? Can the 
xmlns-attribute be omitted if it is present in the start-tag of a parent 
element?

--Don Chamberlin