Dave Crocker wrote: > This semantic distinction between upper and lower case that > folks keep making is not supported by RFC 2119. As far as I'm concerned it is perfectly supported by RFC 2119: The capitalized forms of the keywords have the defined meaning. Other forms can have a different meaning. And where they have the same meaning they should be capitalized to avoid confusion. RFC 2119 itself uses lower case "may", "must", "must not", and "should" in several places where the precise meaning of the capitalized words, i.e. the keywords, would not match. It is of course allowed to avoid mixed uses, but not required. > Case distinction for semantics also goes against normal rules > for English. THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Frank _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf