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<root>
 <tag>
...
  <sub>baz</sub>
 </tag>
</root>

<root>
 <tag>
...
  <value>147</value>
 </tag>
</root>

{
  'tag' => {
...
    }
  }
}

<root>
  <tag>content only</tag>
  <tag attr="1">and content</tag>
</root>