XML Tutorial/Namespace/Attribute

Namespaces and Attributes

Attributes usually don"t have namespaces the way elements do. 
They are just "associated" with the elements to which they belong. 
<person xmlns="http://www.wbex.ru"
    <name id="25">
        <title>Sir</title>
    </name>
</person>
The id attribute is not part of this namespace.
The id attribute is simply associated with the <name> element.
If you used prefixes, you could specify that id is in a namespace. 
<a:person xmlns:a="http://www.wbex.ru"
    <a:name a:id="25"
        <a:title>Sir</a:title>
    </a:name>
</a:person>