Qualified name in namespace declaration

[Tadsedife]

After reading MSDN-XAML Namespaces and MSDN-Understanding XAML Namespaces, I still do not understand the purpose of having a Qualified Name (QName).Take the following namespace declaration as an example:\[quote\] xmlns:x='http://www.w3.org/1999/XSL/Transform'\[/quote\]\[code\]x\[/code\] is the prefix short for the full URI (in this case, an URL) : \[code\]http://www.w3.org/1999/XSL/Transform\[/code\]. Then there is this QName called \[code\]xmlns\[/code\]. The definition for QName in mdsn is:\[quote\] This complete name including the prefix is the lexical form of a qualified name (QName):\[/quote\]What's that supposed to mean and why is it there since thet statement already has a locator and a prefix to identify the namespace and its names to be used?