7. DTD for Elements with Any Content

If an element is declared with the content model of ANY, this means the declared element can contain any type of content (Any element in the document including parsed character data).

Example 7.1 An Element with the ANY Content Model
<?xml version="1.0" standalone="yes"?>
<!DOCTYPE rootelement [
<!ELEMENT rootelement (ANY)>
	<childelelement>Child element.</childelelement>

Giving an element the content model ANY is often not a good idea as it removes syntax checking.