Paul, On 8 Jan 2016, at 11:24 AM, Paul Koning wrote:
> >> On Jan 8, 2016, at 2:13 PM, Clem Cole <cl...@ccc.com> wrote: >> >> I asked our (Intel's) corporate librarians to see if they could find >> X3.27-xxx and in particular -1969 (the original) and -1978 which was version >> 3. I agree with Paul, that V3 (-1978) was the version that most people >> implemented. I seems to remember that, VMS started with V2 and upgraded to 3 >> - as I remember on VAX Serial #1 trying to read tapes from it on the 360 or >> the Univac was funky. >> >> I wish I could remember what changed between the versions. I once knew, and >> I've sent a note to one of my old housemates that wrote some of the VMS tape >> support years ago. He might remember/have some of this stuff. > > I think, but this is a *very* vague memory, that one of the later additions > was the addition of the century number to the date fields. Originally, ANSI > labels were not Y2K compliant. > > paul > That is correct. In X3.27-1978 (version 3) and earlier, date fields are 6 characters " YYDDD". The first character must be a space. In X3.27-1987 (version 4), the first character in date fields is either a space or a 0. " YYDDD" are 19YY dates, "0YYDDD" are 20YY dates. I have paper copies of -1978 and -1987. I don't think it's legal to put them up on bitsavers, though. I think you still have to purchase copies from whoever publishes them now. Larry Baker US Geological Survey 650-329-5608 ba...@usgs.gov
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