Characteristics of XML

<root>
  <first>
    <Subelement attr="xyz" attr2="qwr"/>
  </first>
  <second>
    <AnotherSubelement>
      ABC<Something attr="plk"/>
    </AnotherSubelement>
  </second>
  <third/>
</root>

• Correctly nested
• Matching tags
• Null elements
• Attributes with quotes
• Well formed
• Validated