[Serialization] IBM-SE-003: Undeclare-namespaces parameter

Serialization Section 3, "Serialization Parameters": The 
"undeclare-namespaces" parameter needs a better explanation. I am guessing 
that it means the following: If no namespace node attached to an element E 
defines the namespace prefix P, but P is defined by a namespace node 
attached to the parent of element E, then the serialization of element E 
must contain a namespace declaration attribute that binds the prefix P to 
an empty URI.

--Don Chamberlin