[Apologies - I subscribed in digest mode so my response to your initial comments was not threaded, and this won't be either - fixed now.]
I guess what we are after is what you have referred to as a 'gesture'. Probably shouldn't have used the term 'obligation' in the subject line - I've been looking at the ODRL model, so am used to thinking in terms of permissions/restrictions/obligations. I'm fully aware that - as with pretty much all IP law - enforcement is up to us, so there is always a scalability challenge. But mention within a license at least provides a starting point. In my initial post it appeared that I was jumping to a solution prior to laying out the requirement, so I attempted to clarify the use-case in a follow-up message. What would make our bosses happy (and thus willing to continue to support our contributions) would be: where a site uses our product as the primary basis for a publicly-available service, that a gesture of acknowledgment is publicly-visible. In non-legal English something like "if you use this software as the primary basis for a service with a publicly visible UI, even if under a new skin, whatever, then please acknowledge us on or around your landing page. Our preference would be that you display [this logo] with a link to [our webpage]". A standard-ish formulation would be nice. Simon J D Cox Research Scientist Land and Water<http://www.csiro.au/Organisation-Structure/Flagships/Land-and-Water> CSIRO E simon....@csiro.au T +61 3 9545 2365 M +61 403 302 672 Physical: Reception Central, Bayview Avenue, Clayton, Vic 3168 Deliveries: Gate 3, Normanby Road, Clayton, Vic 3168 Postal: Private Bag 10, Clayton South, Vic 3169 people.csiro.au/C/S/Simon-Cox<http://people.csiro.au/C/S/Simon-Cox> orcid.org/0000-0002-3884-3420<http://orcid.org/0000-0002-3884-3420> researchgate.net/profile/Simon_Cox3<https://www.researchgate.net/profile/Simon_Cox3>
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