CC BY 3.0 and earlier had onerous attribution requirements for data. I believe 4.0 fixes this. I don't think anyone has suggested contacting a data provider who's licensed under CC 4.0 licenses to clarify attribution.
The issue with 3.0 attribution are not purely theoretical, there have been providers who have objected to how we have attribution and we've been unable to use their data. Sent from my iPad > On Feb 21, 2014, at 1:58 PM, Mike Linksvayer <m...@gondwanaland.com> wrote: > > Asking for a clarification that provided attribution is OK seems over the top > too, at least for CC-BY, especially CC-BY-4.0, given "You may satisfy the > [attribution conditions] in any reasonable manner based on the medium, means, > and context in which You Share the Licensed Material." If every attribution > needs to be clarified with the licensor to determine if it is OK, then > attribution licenses truly are a fail. But that practice is certainly not the > intent of such licenses. > > IMO, IANAL, etc etc.
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