original_string: public function getNamespaceURI()
  	{
  		if ( is_null( $this->domNode ) ) return null;
  		return is_null( $this->domNode->namespaceURI ) ? "" : $this->domNode->namespaceURI;
  	}
code: public function getNamespaceURI()
  	{
  		if ( is_null( $this->domNode ) ) return null;
  		return is_null( $this->domNode->namespaceURI ) ? "" : $this->domNode->namespaceURI;
  	}
code_tokens: public function getNamespaceURI ( ) { if ( is_null ( $ this -> domNode ) ) return null ; return is_null ( $ this -> domNode -> namespaceURI ) ? "" : $ this -> domNode -> namespaceURI ; }
docstring: When overridden in a derived class, gets the namespace URI of the current node.
  
  @return string  A string that contains the namespace URI of the current node,
  or Empty if the current node has no namespace URI.
docstring_tokens: When overridden in a derived class gets the namespace URI of the current node .