function getNamespace() {
		if ($this->tag_ns === null) {
			$a = explode(':', $this->tag, 2);
			if (empty($a[1])) {
				$this->tag_ns = array('', $a[0]);
			} else {
				$this->tag_ns = array($a[0], $a[1]);
			}
		}

		return $this->tag_ns[0];
	}
function getNamespace() {
		if ($this->tag_ns === null) {
			$a = explode(':', $this->tag, 2);
			if (empty($a[1])) {
				$this->tag_ns = array('', $a[0]);
			} else {
				$this->tag_ns = array($a[0], $a[1]);
			}
		}

		return $this->tag_ns[0];
	}
function getNamespace ( ) { if ( $ this -> tag_ns === null ) { $ a = explode ( ':' , $ this -> tag , 2 ) ; if ( empty ( $ a [ 1 ] ) ) { $ this -> tag_ns = array ( '' , $ a [ 0 ] ) ; } else { $ this -> tag_ns = array ( $ a [ 0 ] , $ a [ 1 ] ) ; } } return $ this -> tag_ns [ 0 ] ; }
Get namespace of node
@return string
@see setNamespace()
Get namespace of node