XML Schema Complete Reference, The

3.3. Declaring Namespaces

Namespaces are declared by using a family of reserved attributes. In XML 1.0, attributes starting with the three letters ‘xml’ (including variants with capital letters) are reserved for W3C use. To declare a default namespace, you add an attribute named ‘xmlns’ that has a value of the URI you choose to associate the namespace with. For example:

<Customer xmlns="http://www.example.com/foo"> 
     *     *     *     *     * 
</Customer> 

In the preceding example, a default namespace is declared. All unprefixed elements will be in the namespace associated with the URI ‘http://www.example.com/foo’.

Note

As specified in the Namespace Recommendation, all unprefixed attributes are unqualified—not part of any namespace.

There needs to be a way to ...