[OSM-legal-talk] Exception in Open Data License/Community Guidelines for temporary file

[Richard Fairhurst]

Frederik Ramm wrote:
> If, on the other hand, out of the black box comes a derived database, 
> then you can simply share *that* database and nobody cares what 
> happened in the black box, because you only have to share the last 
> in a chain of derived databases that leads to a produced work, right?

I would be interested to hear the view of someone wise who knows about these
things, because I'm not convinced that ODbL mandates publishing the source
(or diff) in every single circumstance.

If your interim derived database is a fairly trivial transformation, as I
suspect many will be, then your changes aren't quantitatively Substantial;
therefore ODbL's provisions may not apply; therefore you may not have to
publish the derivative.

And yes, as Jonathan Harley says, the diff requirement can also be fulfilled
by providing an algorithm. (I don't think that ODbL requires all the
components of the algorithm need be open source, FWIW.)

I am really really really not a lawyer.

cheers
Richard



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