http://people.csail.mit.edu/jaffer/MIXF
	Metric Interchange Format

Abstract

• are unambiguous in all locales;
• use only Portable Character Set [PCS] characters which are also Basic Latin characters in Plane 0 of the Universal Character Set [UCS];
• are transparent to [UTF-7] and [UTF-8] UCS transformation formats;
• are human readable and writable;
• are machine readable and writable;
• incorporate SI prefixes and units;
• incorporate [ISO 6093] numbers; and
• incorporate [IEC 60027-2] binary prefixes.

Motivations

"The 'root cause' of the loss of the spacecraft was the failed translation of English units into metric units in a segment of ground-based, navigation-related mission software, ..."

The audience for metric standards extends beyond scientists and engineers. In the preface to Guide for the Use of the International System of Units (SI) [NIST 811], B. Taylor writes:

The International System of Units, universally abbreviated SI, is the modern metric system of measurement. Long the dominant measurement system used in science, the SI is becoming the dominant measurement system used in international commerce.

Developments

Then in 2006 I noticed that the [CODATA] Recommended Values of the Fundamental Physical Constants had changed, requiring changes to two MIXF conversion factors!

Recent web searches find that ISO currency names are frequently being used with SI prefixes (eg. kUSD and MEUR). Its time to finish the extension of MIXF to currencies: CMIXF.

I have created a mailing list for discussion of unit formats and development of the CMIXF draft. Visit Slib-units Info Page to join.

Venue

Date: Mon, 8 Apr 2002 18:12:03 GMT
Subject: draft-jaffer-metric-interchange-format-03.txt
Cc: rfc-editor@rfc-editor.org, iesg@ietf.org
From: rfc-editor@rfc-editor.org

Aubrey,

We apologize for the delayed response.  The RFC Editor has completed
the review of <draft-jaffer-metric-interchange-format-03.txt>.  We
cannot publish this document as an RFC, as we are the wrong standards
body for this type of publication.

Thank you.

RFC Editor

References

[ANSI X3.50]

ANSI, Representations for U.S. customary, SI, and other units to be used in systems with limited character sets, ANSI X3.50, 1986.

[CODATA]

P. Mohr and B. Taylor, CODATA Recommended Values of the Fundamental Physical Constants, National Institute of standards and Technology, 2006.

[CRC]

Chemical Rubber Company, CRC handbook of chemistry and physics, CRC Press, 67th edition, 1986.

[CSS2]

W3C, Cascading Style Sheets, level 2
CSS2 Specification
W3C Recommendation 1998

[IEC 60027-2]

IEC, Amendment 2 to IEC International Standard IEC 60027-2: Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics., January 1999.

[ISO 2955]

ISO, Information processing-Representation of SI and other units in systems with limited character sets, ISO 2955:1983.

[ISO 4217]

ISO, Codes for the representation of currencies and funds, ISO 4217:2001.
ISO 4217 Currency names and code elements

[ISO 6093]

ISO, Representation of numerical values in character strings for information interchanges, ISO 6093:1985.

[NASA 1999]

NASA, Mars Climate Orbiter Failure Board Releases Report, http://mars.jpl.nasa.gov/msp98/news/mco991110, November 1999.

[NIST 811]

Taylor, B., Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 1995 Edition.

[PCS]

Portable Character Set
The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition

[UCS]

ISO, Universal Multiple-Octet Coded Character Set (UCS) - Part 1: Architecture and Basic Multilingual Plane (BMP), ISO/IEC 10646-1, March 2000.

[UNICODE]

The Unicode Consortium, The Unicode Standard, Version 3.0 Addison-Wesley Pub Co, February, 2000.

[UTF-7]

D. Goldsmith, UTF-7, A Mail-Safe Transformation Format of Unicode, RFC 2152, May 1997.

[UTF-8]

F. Yergeau, UTF-8, a transformation format of ISO 10646, RFC 2279, January 1998.