Deleting an XML node

[blinks58]

I'm trying to delete the <identifier> node of some XML, using the following code; unsuccessfully.

 

Can someone help me identify where I'm going wrong? TIA

$newXML = "";
$xmlString = Fedora_API::callGetDatastreamContents($this->pid, 'MODS', true);
$doc = DOMDocument::loadXML($xmlString);
$xpath = new DOMXPath($doc);

$fieldNodeList = $xpath->query("/identifier");

foreach ($fieldNodeList as $node) {  
	$fieldNodeList->removeChild($node);
}
$newXML = $doc->SaveXML();  

[blinks58]

Solved:

$newXML = "";
$xmlString = Fedora_API::callGetDatastreamContents($this->pid, 'MODS', true);
$doc = DOMDocument::loadXML($xmlString);
$xpath = new DOMXPath($doc);
                                
$fieldNodeList = $xpath->query("/identifier");

foreach($fieldNodeList as $node){
                $node->parentNode->removeChild($node); 
}
                                
$newXML = $doc->SaveXML();  /