[OSM-legal-talk] CTs and the 1 April deadline

[Richard Fairhurst]

I wrote:
> As I said, to understand the attribution "chain" in ODbL, I find it
> helpful 
> to consider OSM as a Derivative Database of OS OpenData (i.e. 
> "Extracting or Re-utilising the whole or a Substantial part of the 
> Contents in a new Database").
> 
> To take the example given in ODbL 4.3a, "DATABASE NAME" would be 
> defined by the database provider (in this case OSMF). For the 
> Derivative Database that comprises OSM original user contributions 
> and some extracts from OS OpenData, this name could include the 
> attribution required by OS.

...and what I should have made explicit is that this is, of course, what we
do already and which everyone (I presume including OS) seems very happy
with... although it isn't clear that it's strictly permitted by CC-BY-SA
2.0.

Our generally accepted attribution statement is "(c) OpenStreetMap and
contributors".

Users can find out more about these contributors by going to
http://www.openstreetmap.org/copyright .

Whether you need to expand "contributors" beyond this depends, as ever, on
the old "substantial" thing, and on that page we do in fact say: "Where data
from a national mapping agency or other major source has been included in
OpenStreetMap, it may be reasonable to credit them by directly reproducing
their credit or by linking to it on this page". For example, the (IIRC)
Dundee cycle map which uses OSM data, including a fair amount of OS
OpenData-sourced material, does exactly that.

cheers
Richard


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