The well-formed XML document has one or more element: root element, parent elements, and child elements. The XML document in the following list starts and ends with a root element, but the name of the element can be anything. All the elements are properly formatted with a start and end tag or empty tag. The child elements are nested within the parent element, and all element are within the root element.
<root>
<parent>
<child>
<grandchild />
</child>
</parent>
</root>