XML Default namespaces for unqualified attribute names?

Question

I\'m trying to understand the correct interpretation of the \"Namespaces in XML 1.0 (Third Edition)\" definition for unqualified attribute namespaces.

Answer 1

I've found the explicit explanation in "XML in a Nutshell" by Elliotte Rusty Harold:

The attributes are a different story. Default namespaces only apply to elements, not to attributes.