xml:id xl:href namespace declarations

Is it wrong to use these attributes in a DocBook 5 document when I
haven't declared these namespaces? The DocBook schema references the
namespaces, but oXygen plays dumb on content completion from them
unless I add the namespaces to the source.


Like so:
<chapter xml:id="blahblah"
	xmlns="http://docbook.org/ns/docbook"
	xmlns:xl="http://www.w3.org/1999/xlink"
	xmlns:xml="http://www.w3.org/XML/1998/namespace"
	version="5">

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