13. DTD for Elements with a Minimum of One or More Children

Elements with children having a minimum of one occurrence can be defined. The "+" sign is used to declare that the child element must occur once or more times inside the element.

Example 13.1 An Element Having a Minimum of One Occurrence
<?xml version="1.0" standalone="yes"?>
<!DOCTYPE rootelement [
<!ELEMENT rootelement (childelement+)>
<!ELEMENT childelement (#PCDATA)>
	<childelement>Child element.</childelement>
	<childelement>Child element.</childelement>