On 5/11/06, xkernigh@netscape.net xkernigh@netscape.net wrote:
Maybe CC-BY 2.0 is incompatible, but CC-BY 2.5 is compatible? Actually, my own reading of CC-BY 2.5 suggests that CC-BY 2.5 is incompatible. License is at http://creativecommons.org/licenses/by/2.0/legalcode and in clause 4a: "If You create a Derivative Work, upon notice from any Licensor You must, to the extent practicable, remove from the Derivative Work any credit as required by clause 4(b), as requested." Clause 4b is the attribution requirement. In short, an author can use clause 4a to change the requirement from attribution to nonattribution. This would apply for example to Wikisource translations of CC-BY works.
Arguably, that clause cannot and does not effectively apply when you use the option to designate an entity for attribution, as we do with Wikinews (section 4.b). When you copy a Wikinews article, you are required to attribute it to Wikinews itself, rather than to the individual authors. The option to designate an entity is relatively new and was introduced specifically for collaborative works like wikis (a CC-WIKI license was briefly under discussion). I suspect that section 4.a needs a bit of an overhaul to deal with this.
Erik