I do not recall discussions here on the list regarding share-alike
licences and Linked Data services.
I suppose an "closed" entity can query ODbL-license data and serve that
under ODbL. But what if the data is aggregated with "closed" data. Is
the ODbL data now "an adapted database" in the sense of
http://opendatacommons.org/licenses/odbl/summary/
I suppose no? It should be regarded as a "Collective Database" in the
sense of paragraph 4.5a in http://opendatacommons.org/licenses/odbl/1.0/
A similar problem occurs in software development were linking to
libraries is an issue, and that is the reason we have the LGPL/GPL
distinction.
In Denmark we have information.dk that extracts data from
Wikipedia/DBpedia and serve it on their webpage along with their
copyrighted journalistic content, e.g.,
http://www.information.dk/verden/mellemoesten/syrien/damaskus . In my
view that shouldn't be a problem.
But the difference between a "Derivative Database" and a "Collective
Database" may not be clear. To be concrete and speak in the SQL language
regarding tables:
A "JOIN" is resulting in a "Collective Database"? Where one part of a
table is ODbL, the other "closed"?
An "UPDATE" is resulting in a "Derivative Database"?
What is an "INSERT" (of a row)? Does it result in a "Collective Database"?
What is an "ALTER TABLE ADD COLUMN" followed by INSERTs in the column?
Does it result in a "Collective Database"?
---
Finn Årup Nielsen
http://www.imm.dtu.dk/~fn/
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