[License-review] Approval: Server Side Public License, Version 1 (SSPL v1)

Stefano Zacchiroli zack at upsilon.cc
Thu Oct 18 09:17:52 UTC 2018

On Tue, Oct 16, 2018 at 09:03:02AM -0400, Eliot Horowitz wrote:

Heya, SSPL reads:

> If you make the functionality *of the Program or* a modified version
> available to third parties as a service, you must make the Service
> Source Code available via network download to everyone at no charge,
> under the terms of this License.

in contrast, AGPL:

> if you *modify the Program*, your modified version must prominently
> offer all users interacting with it remotely through a computer
> network

so SSPL triggers on mere use, rather than on modification (+ use). This
point hasn't seen much discussion in this thread yet, but it seems to me
to be both a major difference with the status quo and a potential
blocker in view of OSD §6 (or, more generally, Freedom 0).

This looks like a more significant differentiation point between AGPL
and SSPL, rather than the stated motivation that it is unclear what is
the reach of AGPL copyleft provision.

Stefano Zacchiroli . zack at upsilon.cc . upsilon.cc/zack . . o . . . o . o
Computer Science Professor . CTO Software Heritage . . . . . o . . . o o
Former Debian Project Leader & OSI Board Director . . . o o o . . . o .
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