SDP does not use an OPC-UA namespace for its nodes
In order to create a mapping from OPC-UA attributes (MPs and CPs) to Tango attributes SC has to lookup the known node names in the OPC-UA server to get access to them from our OPC-UA client. For this we have to traverse the node tree with the help of a namespace index which is part of every node name. In the case of the SDP this value appears to be randomly set to "1" so that node names become "1:sdp_blah" or "1:tr_blah" or something like it with "1:*". SDP should create a namespace "http://lofar.eu" (like PCC does) and then use the returned namespace index to create the nodes instead which allows SC to construct the node path without guessing.