Although the comments about "lazy" are specious, I support requiring uppercase display simply from the viewpoint of easy recognition by those of us with less-than-perfect visual acuity. There probably is no other strong reason except apparent consistency of display which, in itself, is a good thing.
On Dec 2, 2010, at 4:17 PM, RFC Errata System wrote: > > The following errata report has been submitted for RFC5952, > "A Recommendation for IPv6 Address Text Representation". > > -------------------------------------- > You may review the report below and at: > http://www.rfc-editor.org/errata_search.php?rfc=5952&eid=2656 > > -------------------------------------- > Type: Technical > Reported by: D. Stussy <d.stu...@yahoo.com> > > Section: 4.3 > > Original Text > ------------- > 4.3. Lowercase > > The characters "a", "b", "c", "d", "e", and "f" in an IPv6 address > MUST be represented in lowercase. > > > Corrected Text > -------------- > 4.3. Case of Alphabetic Digits. > > The digits "A" through "F" in an IPv6 address > MUST be represented in upper case. User and user > derived input may be represented using lower case. > > > Notes > ----- > Historically from the 1960's, hexidecimal digits other than decimal digits > are represented by upper case letters. Lower case letters may have become > acceptable as user input, but such resulted from lazy programmers who > couldn't manage to hit the shift key on their keyboards. However, lower case > is not acceptable for digit output. Many early assemblers would not even > accept lower case as valid input digits except where the radix base exceeded > 36 (thus exhausting all upper case values). This poor programming practice > should not be allowed to be codified into any Internet standard. > > <SNIP/> > -------------------------------------------------------------------- Although the comments about "lazy" are specious, I support requiring uppercase display simply from the viewpoint of easy recognition by those of us with less-than-perfect visual acuity. There probably is no other strong reason for requiring either case except apparent consistency of display which, in itself, is a good thing. James R. Cutler james.cut...@consultant.com -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
