Created element of UsernameToken for SOAP Security header.
This class is used internally by Caché. You should not make direct
use of it within your applications. There is no guarantee made about either
the behavior or future operation of this class."
Inherited description: NAMESPACE specifies the XML namespace to be used when projecting the
class to XML. if NAMESPACE - "", the default namespace is used for the XML schema
is used as the namespace for his class.