On 17/01/17 16:44, Massimo Zaniboni wrote:
every change to A made by B is automatically owned by B author, thanks to Berne Convention
Not entirely true. Only significant changes are owned by B. De minis and obvious changes don't attract an independent copyright.
More generally on this topic, the requirement to include the copyright and licence in the permissive licences is only really codifying best practice. That's especially true for open source derivatives, where the implied warranty that the supplier has the right to issue the end user licence, or even distribute the software, is being waived.
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