Hi I think that the intention was just to be able to use whatever short name suits you. You could use: @prefix prj: <http://usefulinc.com/ns/doap#> @prefix l2: <http://lv2plug.in/ns/lv2core#> @prefix lv2: <http://myownsite.org/LowVoltageVariation#> ... I am not judging. Regards Bruno