Metric Interchange Format
|Representation of numerical values and SI units in character strings for information interchanges||
|Representation of currency and SI units in character strings for information interchanges||
Metric Interchange Formats describe character string encodings for numerical values and units which:
[ISO 4217] currency names.
According to [NASA 1999] Arthur Stephenson, chairman of the Mars Climate Orbiter Mission Failure Investigation Board:
"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, ..."
Although the [ISO 6093] standard for automated interchange of numerical data is widely used, standardized measurement units (other than for page formating) are not routinely attached to interchange data.
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.
This, and the widespread use of metric prefixes with currency symbols motivates the inclusion of [ISO 4217] currency names.
In 2002, Jon Krom, Arnold Reinhold, and I devised an extension to
Metric Interchange Format (
MIXF) to incorporate monetary
units based on [ISO 4217].
I was somewhat dissatisfied with it because, while currency exchange rates change hourly, physical units are unchanging; also, there was little use of metric prefixes with currencies on the web at that time.
Then in 2006 I noticed that the [CODATA]
Recommended Values of the Fundamental Physical Constants
had changed, requiring changes to two
Recent web searches find that ISO currency names are frequently being
used with SI prefixes (eg. kUSD and MEUR). Its time to finish the
MIXF to currencies:
I have created a mailing list for discussion of unit formats and
development of the
CMIXF draft. Visit
Slib-units Info Page to join.
In 2002 the RFC editor decided that
was not within the IETF's purview. Since then I have hosted
Is there some standards organization which
CMIXF would be
Date: Mon, 8 Apr 2002 18:12:03 GMT Subject: draft-jaffer-metric-interchange-format-03.txt Cc: firstname.lastname@example.org, email@example.com From: firstname.lastname@example.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
I am a guest and not a member of the MIT Computer Science and Artificial Intelligence Laboratory.
My actions and comments do not reflect in any way on MIT.|
|Aubrey Jaffer||agj @ alum.mit.edu||Go Figure!|