I need to redistribute my software with jetty-6.1.19.zip from Jetty site. Am I allowed to remove from this zip all unnecessary cruft (docs, samples, etc.) and than redistribute such a modified package ? Software is a proprietary based.
From the Licensing conditions of the Apache License on Wikipedia:
Like any free-software license, the Apache License allows the user of the software the freedom to use the software for any purpose, to distribute it, to modify it, and to distribute modified versions of the software.
The Apache License does not require modified versions of the software to be distributed using the same license nor even that it be distributed as free/open-source software. The Apache license only requires that a notice is kept informing recipients that Apache licensed code has been used. Thus, in contrast to copyleft licenses, recipients of modified versions of Apache licensed code do not necessarily also get the above freedoms. Or considering the situation from the Apache licensees perspective, they receive the freedom to use the code in any way they want, including using it in closed source products (cf Paragraph 4).
Two files that must be put at the top directory of redistributed software packages:
- LICENSE - a copy of the license itself.
- NOTICE - A "notice" text document listing the names of licensed libraries used, together with their developers.
In every licensed file, any original copyright or patent notices in redistributed code must be preserved, and in every licensed file changed a notification must be added stating that changes have been made to that file.
So, my understanding is that, yes, you are allowed to modify and redistribute a modified version in proprietary software. Just provide the notice and a copy of the original license.