JSON

[{"a":1,"b":2,"c":3},{"a":"x","b":"y","c":{"a":4,"b":5,"c":"hello world"}},"lorem ipsum dolor",3.14159]

XML

<data>
	<datum type="object">
		<members>
			<member identifier="a" type="int">1</member>
			<member identifier="b" type="int">2</member>
			<member identifier="c" type="int">3</member>
		</members>
	</datum>
	<datum type="object">
		<members>
			<member identifier="a" type="char">x</member>
			<member identifier="b" type="char">y</member>
			<member identifier="c" type="object">
				<datum>
					<members>
						<member identifier="a" type="int">4</member>
						<member identifier="b" type="int">5</member>
						<member identifier="c" type="string"><![CDATA[hello world]]></member>
					</members>
				</datum>
			</member>
		</members>
	</datum>
	<datum type="string">
		<![CDATA[lorem ipsum dolor]]>
	</datum>
	<datam type="int">
		3.14159
	</datum>
</data>

but usually isn't formatted and like this: