On Tue, Nov 23, 2010 at 11:02 AM, Ray Denenberg, Library of Congress
<[log in to unmask]> wrote:
> The problem is that 'x' is often used to mean "any and all digits", so that "8xx" literally means "all values 800 through 899" when what we want it to mean is "one specific value in the range of 800 through 899 (inclusive)". I think we need to kick around another character, if 'u' is considered unacceptable. I find it unfortunate, because I think that 'u' is the most natural character to use for this purpose.
I would interpret x to be "any value" rather than "all values" ... I
think that would be a difference between a variable in programming
(where a variable represents only one actual value at any given
moment) and a variable in mathematics (where a variable represents an
entire domain or set of values that satisfy some abstract criteria).
I think the community that we're aiming for is the larger
programming/data processing world so the 'x' would be understood to be
a variable in that sense not in the mathematical sense.