On Thu, 22 Jan 2009, Ivan Voras wrote:
2009/1/22 Robert Watson <rwat...@freebsd.org>:
FWIW, the one case where I don't really do that is when I worked on some
code on my own and hence hold the copyright for it, then did some work
under a contract for a customer on it such that they own the copyright on
enhancements, and then I do some further work on my own. In that case,
I'll leave a discontinuity to reflect the fact that the copyright on
changes made in the gap were assigned elsewhere. Not clear this is the
right thing to do, but I'm fairly sure at least some of my customers are
more comfortable with that as it leaves no confusion in the source as to
which bits they sponsored/own.
Of course this is purely cosmetic as "one year" is a terrible granularity
for commits to a moving target :)
(i.e. legally it's worthless information)
Sorry, that simply isn't the case, as copyright expiration doesn't track the
exact moment at which something was created. Copyright law varies by country,
but US copyright law is of particular importance to the FreeBSD Project, so I
direct you to the US Copyright Office's rather helpful circular 92, which
provides a useful summary:
ยง 305. Duration of copyright: Terminal date
All terms of copyright provided by sections 302 through 304 run to the end
of the calendar year in which they would otherwise expire.
So the year of creation really is the date that matters. And as nebulous as
the far-off expiration of copyright dates may seem to you now, remember that:
(a) we work on software that includes copyrights almost 30 years old, and (b)
copyright law has an annoying propensity to change out from under you.
Robert N M Watson
Computer Laboratory
University of Cambridge
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