protected static function _tagPattern( $open = true, $selfClose = false )
    {
        if ( true === $open )
        {
            return static::_openStartDelimiter( $selfClose ) . self::ValuePlaceholder . static::_openEndDelimiter( $selfClose );
        }

        return static::_closeStartDelimiter() . self::ValuePlaceholder . static::_closeEndDelimiter();
    }