p>
<p>
	Both JSON and XML are commonly used to describe objects and properties; both allow
	for tree-like structure. Both are strict (to some level) in data definition.
</p>
<p>
	<i>json_to_xml()</i> assumes a valid JSON input, and returns its XML equivalent, such that:
	<ul>
		<li>
			Internal structural tests on JSON format apply. 
			In any case of failure the function returns <strong>NULL</strong>
		</li>
		<li>
			Produced XML is consisted of elements and text. No attributes generated.
		</li>
		<li>
	