Proceedings of the 2008 international working conference on Mining software repositories
License integration patterns: Addressing license mismatches in component-based development
ICSE '09 Proceedings of the 31st International Conference on Software Engineering
Analyzing software licenses in open architecture software systems
FLOSS '09 Proceedings of the 2009 ICSE Workshop on Emerging Trends in Free/Libre/Open Source Software Research and Development
An exploratory study of the evolution of software licensing
Proceedings of the 32nd ACM/IEEE International Conference on Software Engineering - Volume 1
Understanding and Auditing the Licensing of Open Source Software Distributions
ICPC '10 Proceedings of the 2010 IEEE 18th International Conference on Program Comprehension
A sentence-matching method for automatic license identification of source code files
Proceedings of the IEEE/ACM international conference on Automated software engineering
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FOSS (Free and Open Source Software) is repeatedly modified and reused by other FOSS or proprietary software systems. They are released to others under specific licenses whose terms and conditions are usually written on the source-code files as program comments. There are a few researches which automatically analyze the licenses in a FOSS release, but there is no statistical study on the evolution of licenses along the evolution of FOSS. In this paper, we analyze licenses through FreeBSD, OpenBSD, Eclipse, and ArgoUML evolution, using our license analysis tool Ninka, and discuss characteristics on the evolution of the license used in those systems.