The spec itself: <a href="https://docs.google.com/spreadsheets/d/1UmAU9aNvGOPNY0vG-LKE5Ka2VEbbNtTSgVlob2irb-4/edit#gid=0" rel="nofollow">https://docs.google.com/spreadsheets/d/1UmAU9aNvGOPNY0vG-LKE...</a>