Week 6 a.k.a. All Rights Reversed

-

"Copyright: all rights reserved" and "Copyleft: all rights reversed". While it stared out as a little bit of fun, things escalated quickly. What once was a pun on copyright, has developed into a legitimate legal term. This is Week 6 of SPEAIT2021K course and I would like to talk copyleft today.

Copyleft is an important factor in free licenses that determines whether the license will influence the derived works or not. It can be divided into three grades: strong, weak and no copyleft.



1. Strong Copyleft

Strong copyleft demands that all derived works retain the license of the original, meaning that software under this license cannot be made proprietary. One of the most popular strong copyleft licenses, GNU GPL defines several freedoms for user, including freedom to run the program for any purpose, to study how the program works and to redistribute copies of both original and your modified versions to others. Other example of such license would be AGPL, sometimes called 'extra strong' copyleft.



2. Weak Copyleft

Next up there is weak copyleft licenses that have some exceptions set to allow better software integration with proprietary systems and are widely used in libraries. Examples include the MPL, the EUPL, the Microsoft Public License and the Reciprocal Public License and the GNU LGPL, also reffered to as GNU "Lesser" GPL.



3. No Copyleft

The third type is no copyleft licenses, that do not restrict licensing of derivative works. It is possible to create proprietary software based on the software under no copyleft license, thus making this type of licensing more appealing to developers while cutting back on the continuity assurance for the end users. No copyleft licenses include the BSD license, the MIT license and the Apache license.

Generally, the choice of license for your software depends on your goals and sources you use. If you use strong copyleft license as the foundation of your work you have no choice but to release your work under the same license. On the other hand, you can create proprietary software if your work was based on the no copyleft licensed software. The choice is almost up to you.

Комментарии

Отправить комментарий

Популярные сообщения из этого блога

Week 4 a.k.a. Big Challenges Of The Information Society

-
This week our task was to read and give our opinion about the Challenges of The Global Information Society report by Pekka Himanen. This is Week 4 of SPEAIT2021K course and I would like to analyze aforementioned report. The aim of the report was to take a look at the main challenges in the information society. Report also proposes a way to overcome these challenges - so-called "Finnish model", the model of the information society combined with the welfare state. Dr. Pekka Himanen, world famous researcher of the information age, was asked to prepare the report for the Finnish Parliament's Commitee for the Future. After listing ten global trends in strong progress that accompany the global development of the information society, Dr. Pekka Himanen proceedes to describe three development scenarios -  The  " Sillicon Valley model", The "Singapore model" and The "Finnish model", that has the danger of "dead hand passivity". This means, th
Далее...

Week 1 a.k.a. For Each Success Story There Is Couple Of Failures

-
Изображение
Sometimes it happens, that an initially promising idea or product fails miserably when launched. It may happen for both obvious and not so obvious reasons, but either way, companies should learn their lesson or they may never recover from the failure. This is Week 1 of SPEAIT2021K course and I would like to tell you about three IT-related products that failed. 1. PSP E1004 PSP E1004 The first thing on my list is PSP E1004, also known as PSP Street. PSP, stands for PlayStation Portable, is a handheld game console developed by Sony. Overall, PSP was quite a succesful platform with over 80 million of them being sold worldwide. You have to agree, that it is quite frustrating to spend all your savings to update your PC only to realize that it became outdated... again. Well, that was certainly not the case with portable gaming consoles, which proceeded to make their owners happy for years and years. Once you'd bought it, you did not need to worry about upgrading it, you could just kick b
Далее...

Week 12 a.k.a. Seven Values Of A Modern Hacker

-
This week's blogpost is going to be the analyzis of Dr. Pekka Himanen's seven hacker values from Hacker Ethics . This is Week 12 of SPEAIT2021K course and I would like to become a hacker.  1. Passion This is described by Dr. Pekka Himanen as an "intrinsic creative push that motivates them [hackers] to explore, create and adapt"  and in my opinion that is the most important value out of all seven. Regardless of whether you're a hacker or not, you need to be passionate about what you do, you need to find joy in doing it. "If you do what you love, you'll never work a day in your life". 2. Freedom Although it makes sense and is applicable in some cases, complete freedom cannot and should not be guaranteed in all aspects of life. In my opinion it is okay to have freedom in your actions as long as it doesn't interfere with other people's freedom and well-being. 3. Work Ethic While it is acceptabale and even necessary to debate rules in some context
Далее...