1<schemalist> 2 <schema id='base'> 3 <key name='foo' type='s'> 4 <default>'bar'</default> 5 </key> 6 </schema> 7 8 <schema id='sub' extends='base'> 9 <override name='bar'>'baz'</override> 10 </schema> 11</schemalist> 12