Dokumentissa
Open Data License/Legal Structure (http://wiki.openstreetmap.org/wiki/Open_Data_License/Legal_Structure)
Sanotaan, että “ODbL does offer the possibility of adding other attribution where another substantial data source has been imported (typically not under ODL-Factual). For example, the Canadian Geobase licence requires attribution.” ja tekstissä linkitetään tuohon Geobase licenssiin (http://www.geobase.ca/geobase/en/licence.jsp). Jossa on muuten vain yksi vaatimus (3.0 PROTECTION AND ACKNOWLEDGEMENT OF SOURCE): “The Licensee shall identify GeoBase® as a data source where any of the Data are redistributed, or contained within Derivative Products, and use of the Data shall not be construed as an endorsement by GeoBase® of those Derivative Products.”
Siinäpä olisi ollut hyvä lisenssimalli MML:lle. Ainoastaan attribution, ei edes vuosilukua tms. tarvitsisi kertoa.