Notes:
Registering and removing namespaces is also part of this chapter.
The announced IDENTIFIER_STABILITY must be guaranteed by the transport.
The interface does not differ though.
/**
* {@inheritDoc}
*
* @api
*/
public function unregisterNamespaceByURI($uri)
{
if (!$this->transport instanceof WritingInterface) {
throw new UnsupportedRepositoryOperationException('Transport does not support writing');
}
$this->lazyLoadNamespaces();
$prefix = array_search($uri, $this->userNamespaces);
if ($prefix === false) {
throw new NamespaceException("Namespace '{$uri}' is not currently registered");
}
// now check whether this is a prefix out of the defaultNamespaces in checkPrefix
$this->checkPrefix($prefix);
$this->transport->unregisterNamespace($prefix);
//remove the prefix from the local userNamespaces array
unset($this->userNamespaces[$prefix]);
}
