I usually assume "should" and "must" in such contexts to be similar in meaning to rfc2119 [1]. Of course, it's up to Google be be clear with exactly what shoul

I usually assume "should" and "must" in such contexts to be similar in meaning to rfc2119 [1]. Of course, it's up to Google be be clear with exactly what should or must be done. Unless they want to be unclear.. [1] http://www.ietf.org/rfc/rfc2119.txt http://www.ietf.org/rfc/rfc2119.txt