Indicates that an unprefixed element and all its unprefixed descendant
elements belong to a particular namespace by attaching an xmlns
attribute with no prefix:
<DATASCHEMA xmlns="http://www.w3.org/2000/P3Pv1">
<DATA name="vehicle.make" type="text" short="Make"
category="preference" size="31"/>
<DATA name="vehicle.model" type="text" short="Model"
category="preference" size="31"/>
<DATA name="vehicle.year" type="number" short="Year"
category="preference" size="4"/>
<DATA name="vehicle.license.state." type="postal." short="State"
category="preference" size="2"/>
<DATA name="vehicle.license.number" type="text"
short="License Plate Number" category="preference" size="12"/>
</DATASCHEMA>
Both the DATASCHEMA and DATA elements are in the
http://www.w3.org/2000/P3Pv1 namespace.
Default namespaces apply only to elements, not to attributes.
Thus in the above example the name, type,
short, category, and size
attributes are not in any namespace.