[OSM-legal-talk] ODbL: How obscure/inaccessible can published algorithms be?

[Anthony]

On Sat, Dec 12, 2009 at 6:10 PM, Frederik Ramm <frederik at remote.org> wrote:

> I think we have now established that whenever you do something with OSM
> data that involves a derivative database, but just to make things
> simpler for you and not as an absolutely necessary component, then
> nobody can prove that you are using a derivative database, and nobody
> has a legal right to challenge you for an explanation - it's your
> business secret.
>

Where does one draw the line between a "Derivative Database", a "Collective
Database", and a "Produced Work" anyway?  Can a "Produced Work" also be a
"Derivative Database"?  If not, which definition overrides the other?  An
image qualifies under the definition of "Database", does it not?
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