[LOGBack-dev] Logback License

Ceki Gülcü listid at qos.ch
Mon Sep 11 23:04:25 CEST 2006

Hi Boris,

SLF4J is licensed under an X11 type of license which is considered
universal, in the sense both the Free Software Foundation and Apache
Software Foundation deem it compatible with their respective
licensed. I am not aware of any organization which has issues with the
X11 license.

Logback is licensed under LGPL because while its use is completely
free, we would like logback extensions to be distributed under
LGPL. The LGPL is widely accepted. One of the rare places where its
frowned upon is the ASF. However, even ASF projects can use logback, as
long as they do so behind SLF4J, which also happens to be the way
recommended by logback.

Does this answer your question?

At 10:32 PM 9/11/2006, Boris Unckel wrote:
>in opposite to slf4j logback is licensed under LGPL. I understand that 
>both are compatible, but why
>is logback not released under a BSD-Style license like slf4j?

Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.

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