You must be working from a different copy of the SI brochure than I am,
Gene. I'm using the 7th edition (1998) and Supplement 2000. The only
units I see listed in Table 6 are day, hour, and minute. The footnotes
to the table do not mention the year. The text does indicate that other
non-SI units exist but it doesn't name them, though it does say that
some of those units are "units of time".
Is it possible that you are referring to a derivative work? NIST SP 811
*does* specifically mention the week, month, and year in its textual
material as non-SI units and states that they should be spelled out. (It
also refers to Sec. 8.1, which notes that ISO 31-1 suggests "a" as the
symbol for "year".) But it, too, omits the year from Table 6.
When you're ready to give up the week, month, and year, Gene, I'll be
ready to give up the hectare.
Jim
Gene Mechtly wrote:
>
> On Sat, 17 Feb 2001, James R. Frysinger wrote:
>
> > ...the year isn't even *currently* accepted for use, unlike the
> > hectare.
> Let's be accurate, Jim.
> The "year" is listed in Table 6, "accepted for use" with SI,
> with no stated limitations or qualifications.
> The "hectare" is listed in Table 8, with deprecation by the word
> "currently" accepted, and by the constraint "...use is not encouraged."
> There are things I would like to change in the official SI also
> if I had the clout to do so. e.g. All prefix symbols for multiples greater
> than one are uppercase symbols. They are: D, H, K, M, G, T, P, E, Z, and Y.
> Help sell that improvement to members of the CIPM.
> Gene.
--
Metric Methods(SM) "Don't be late to metricate!"
James R. Frysinger, CAMS http://www.metricmethods.com/
10 Captiva Row e-mail: [EMAIL PROTECTED]
Charleston, SC 29407 phone/FAX: 843.225.6789
