An information source I want to use (from the Tel Aviv municipality) has been released under the following terms:
“When using the information and databases, you must indicate the source of the information, and if possible link to this license.”
That is what their online license says, and when I emailed them asking to clarify our specific case, they basically referred me back to the license.
To fulfill these terms, is it sufficient to add an entry on http://wiki.openstreetmap.org/wiki/Contributors ?