/**
* Add a child node. This method will set the child's parent to this object.
* @param SDNode $child the child node to add
*/
function addNode(SDNode $child) {
$child->setParent($this);
$this->children[] = $child;
}
/**
* Construct a PI node with specified target and data
*
* @param SDElement $parent the owning element
* @param string $target the PI target
* @param string $data the data of the PI
*/
function __construct($parent, $target, $data) {
parent::__construct($parent);
$this->setTarget($target);
$this->setData($data);
}
