-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Jeff Waugh wrote:
| <quote who="Brad Kowalczyk"> | |> Just one small Q, lets say I develop an app and release it under |> say the GPL, if I then improve on this app adding new features |> and functionality and wish to make a $ with it can I then release |> it under a <shudder>>closed source</shudder> license even though |> it is heavily based on GPL'd code? | | | Because you hold the copyright, yes. | | Here's an example: | | Ximian wrote the Evolution groupware suite, so hold the copyright. | They require copyright attribution from contributors so that they | continue to hold copyright over the complete work. That allowed | them to ship Evolution with the Exchange connector (which until a | few weeks ago, was closed). | | If their contributors had not assigned copyright, Ximian would not | be able to ship a proprietary module along with their contributor's | code. Quite a few projects work in a similar fashion | (FSF/GNU-backed projects, Twisted, etc).
Jeff
A few questions if I may.
Are there any projects where subsequent developers have also dual licensed their contributions under the GPL and a closed source license? Essentially they would trying to do the same as Ximian or MySQL, viz. have an income stream from commercial extension and application while making their code freely available under the GPL.
Alternatively are their commercial contracts for assigning copyright under dual licensing? (e.g. I get one dollar for every seat where this application is used under a commercial license.) Or is this too messy to handle in practice?
David
- -- PGP public key 0x24606D9C at pgp.mit.edu 56D7 3608 6D73 0E11 064E 79C8 AC8E 6CAE 2460 6D9C
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFAwlLirI5sriRgbZwRAhJjAJ4/CUMffwHZQp62DVUfI0y0HTQlfgCfTCEB 7GfkGxCUi4SIsRcP8m2lzPw= =/e2T -----END PGP SIGNATURE-----
-- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
