----- Original Message ----- From: "Tim Parenti" <tim@xxxxxxxxxxxxxxxxx> Sent: Thursday, September 13, 2018 3:21 PM > It's a fairly standard interval or range notation in mathematics that the > types of the brackets used are important. I would imagine this appears in > plenty of other RFCs and the like. > > The square left bracket next to 0 means "starting at and including 0", > while the round right bracket next to 'typecnt' means "up to but NOT > including 'typecnt'." So there are a total of 'typecnt' elements, indexed > from 0 to 'typecnt'-1, inclusive. Likewise for (desig)idx and charcnt. > > https://en.wikipedia.org/wiki/Interval_(mathematics) > > This convention of including the lower bound and excluding the upper has an > established history in computing as well: > https://www.cs.utexas.edu/users/EWD/transcriptions/EWD08xx/EWD831.html Ah yes, my mathematics has indeed let me down. Thank you for putting me right. Tom Petch > -- > Tim Parenti > > > On Thu, 13 Sep 2018 at 07:55, tom petch <daedulus@xxxxxxxxxxxxx> wrote: > > > My arithmetic may be letting me down, but in s.3.2, when there are > > 'typecnt' entries in a list of transition types, then I would expect the > > index to be > > [0, 'typecnt'-1) > > or > > [1, 'typecnt') > > but not > > [0, 'typecnt') > > as the I-D says, unless zero has a special meaning but then it is not > > really an index. > > > > Ditto for (desig)idx and charcnt except that this list is NUL > > terminated, but then I would not expect it to be valid to index the NUL. > > > > I infer, and would rather be told explicitly, that > > "The total number of octets is specified by the 'charcnt' field .. > > excludes the NUL that terminates the list. > > > > In s.1, > > "the source the time zone data metadata, identifiers, ..." > > would appear to be light of an 'of'. > > > > Tom Petch > > > > ----- Original Message ----- > > From: "The IESG" <iesg-secretary@xxxxxxxx> > > Cc: <lear@xxxxxxxxxxxxxxxxxxx>; <tzdist-bis@xxxxxxxx>; > > <draft-murchison-tzdist-tzif@xxxxxxxx>; <alexey.melnikov@xxxxxxxxx> > > Sent: Tuesday, September 11, 2018 4:55 PM > > > > > The IESG has received a request from an individual submitter to > > consider the > > > following document: - 'The Time Zone Information Format (TZif)' > > > <draft-murchison-tzdist-tzif-13.txt> as Proposed Standard > > >
