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The strength of the copyleft license governing a work is determined by the extent to which its provisions can be imposed on all kinds of derivative works. Thus, the term "weak copyleft" refers to licenses where not all derivative works inherit the copyleft license; whether a derivative work inherits or not often depends on how it was derived.
The strength of the copyleft governing a work is an expression of the extent that the copyleft provisions can be efficiently imposed on all kinds of derived works. "Weak copyleft" refers to licenses where not all derived works inherit the copyleft license; whether a derived work inherits or not often depends on the manner in which it was derived.
Common law copyright is the legal doctrine that grants copyright protection based on common law of various jurisdictions, rather than through protection of statutory law. In part, it is based on the contention that copyright is a natural right and creators are therefore entitled to the same protections anyone would be in regard to tangible and ...
There is a certain amount of work that goes into making copyright successful and just as with other works, copyright for computer programs prohibits not only literal copying, but also copying of "nonliteral elements", such as program's structure, sequence and organization. These non-literal aspects, however, can be protected only "to the extent ...
As a result, the use of copyright notices has become optional to claim copyright, because the Berne Convention makes copyright automatic. [57] However, the lack of notice of copyright using these marks may have consequences in terms of reduced damages in an infringement lawsuit – using notices of this form may reduce the likelihood of a ...
Direct evidence of actual copying by a defendant rarely exists, so plaintiffs must often resort to indirectly proving copying. [1] [page needed] Typically, this is done by first showing that the defendant had access to the plaintiff's work and that the degree of similarity between the two works is so striking or substantial that the similarity could only have been caused by copying, and not ...
Free Software Licensing – is dedicated to justifying a need for free software licenses, describing differences between them and explaining copyleft. It contains a full text of the GNU General Public License, the GNU Lesser General Public License and the GNU Free Documentation License.
Even if all prongs are met, there are fair use defenses that may defeat a claim of copyright infringement. [7] Beyond these basics, US copyright law is complex, confusing, and inconsistent, with a variety of tests employed by courts to determine when copyright has been infringed, including by paraphrasing.