en fr Latn published accessed created implemented obsoleted confirmed updated issued -- normative informative normative informative normative informative normative informative normative informative normative informative normative informative danger caution warning important safety precautions left right center left right center international-standard technical-specification technical-report publicly-available-specification international-workshop-agreement guide 00 10 20 30 40 50 60 90 95 00 20 60 90 92 93 98 99 normative informative normative informative normative informative