dear all,

i understand that an author owns the copyright to a software. under
this 'ownership' the author may then decide to GPL the software,
allowing others more flexible access to the software, under the
restrictions imposed by the GPL. This also allows contributors to add
their own code or further develop the software.
Yet, can the original author choose to un-gpl a software? i have seen
some extremely rare instances over the past few years of software that
were released under the GPL, and then retracted into a proprietory
license.

what happens to the code contributed by other developers who wrote for
what to them appeared to be a GPL-ed software then?

can the original/initial author, at a later date, choose to release
the software under dual, multiple licenses too, such as Apache+GPL, or
Apache+GPL+LGPL, or the QT or the staggered Ghostscript kind of
license?

what happens to the code contributed by others? don't such developers
have issues?

what if an athor hands over a project to a maintainer, who in
conjunction with a larger community generates and gets generated code
far in excess of the initial author's offering? can such a
community-based project decide at a later date to un-gpl, or gpl++
(with dual or multiple licenses) the software? what if the initial
author wishes to do this but the maintainer/community doesn't. or
vice-versa?

have been googling, but haven't found relevant answers.

sidenote: i do remember that staroffice was an opensource project
(gpl?) from some german developers, until sun became its "vidhaata"
(took ownership? purchased? how?) and forked it as openoffice under
GPL, and staroffice under SISL something. how does that work?

please enlighten me.

thanks in advance.

:-)
LL

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