I'm sorry if this is already discussed. After the license change to ODbL, how should I change the attribution of mapnik tiles using openlayers like this: http://osm.jp Like this? Map tile (c) CC BY-SA 2.0 OpenStreetMap Or like this? Map data (c) ODbL 1.0 OpenStreetMap contributors and Map tile (c) CC BY-SA 2.0 OpenStreetMap Shu Higashi