public function &appendNode(DOMNode &$a_tag)
{
switch ($this->m_node->nodeType) {
case XML_DOCUMENT_NODE:
$node = $this->m_node->isSameNode($a_tag->ownerDocument) ? $a_tag : $this->m_node->importNode($a_tag, true);
$this->m_node->appendChild($a_tag);
return $this;
case XML_ELEMENT_NODE:
$node = $this->m_node->ownerDocument->isSameNode($a_tag->ownerDocument) ? $a_tag : $this->m_node->ownerDocument->importNode($a_tag, true);
$this->m_node->appendChild($node);
return $this;
}
return $this;
}