Re: ISO paper sizes

Article View: comp.std.internat

Article #701

#701

From: Erik Naggum
Date: Sun, 10 Jan 1993 21:46

27 lines
1492 bytes

[Alasdair Grant]
:
|   1 SI inch is 2.54mm _exactly_, not just to 7 decimal places.

There is no Systeme International "inch".

|   But the people who don't use ISO paper sizes don't use SI inches
|   either, they use NIST inches, which differ from SI inches well before
|   the 8th decimal place.  (I don't know the exact details - after all,
|   why should I know about American internal standards?)

"NIST" inches were aligned with the SI units well before 1982 (my earliest
reference to 1 inch = 2.54 cm), except for the US Survey foot, which is
~1.000002 ft, and reflects the old inch, for very sound reasons.

|   I believe NIST inches are a standard unit in HyTime.

The HyTime inch is 254/100 cm, or 2.54 cm, exactly.  There is no other
definition of inch in HyTime.  Of course.

Best regards,
</Erik>
--
Erik Naggum                 ISO  8879 SGML                    +47 295 0313
Oslo, Norway                ISO 10744 HyTime
<erik@naggum.no>            ISO  9899 C                 Memento, terrigena
<SGML@ifi.uio.no>           ISO 10646 UCS             Memento, vita brevis

Technical Details

Message-ID: <19930110.007@erik.naggum.no>

Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!aun.uninett.no!nuug!ifi.uio.no!enag

References: <1i9j4gEINN8nd@uni-erlangen.de> <1993Jan4.170125.3951@infodev.cam.ac.uk>

Show Full Headers

Complete Article Headers

Newsgroups: comp.std.internat
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!aun.uninett.no!nuug!ifi.uio.no!enag
From: Erik Naggum <erik@naggum.no>
Reply-To: Erik Naggum <enag@ifi.uio.no>
Message-ID: <19930110.007@erik.naggum.no>
Date: 10 Jan 1993 22:46:12 +0100
References: <1i9j4gEINN8nd@uni-erlangen.de> <1993Jan4.170125.3951@infodev.cam.ac.uk>
Subject: Re: ISO paper sizes
Lines: 27

Reply to Parent Message