Hi, Attached is the NetherLight A-GOLE topology in N3 format. Hadn't time to use a validator but I think it is more or less correct :) I just used vi to create the N3 description. The SNE editor is nice, but it is just a temporary solution. In the (near) future we will have our NRM generate this information automatically. The only thing missing in the description are the correct connectedTo URI's to the other domains (except for the UvA one's). But this in only a bootstrap problem. Once everybody has a correct topology description of his own domain, for new ports this kind of information is exchanged with other information like path positions, VLAN information, time slots, etc., during the setup of a new interconnection between domains. HansT.