: 1http://data.ordnancesurvey.co.uk/id/50kGazetteer/ Create a prefix for http://data.ordnancesurvey.co.uk/id/50kGazetteer/ Hit Enter to save Double click to create a prefix | : oneKMGridReferencehttp://data.ordnancesurvey.co.uk/ontology/spatialrelations/ Create a prefix for http://data.ordnancesurvey.co.uk/ontology/spatialrelations/ Hit Enter to save Double click to create a prefix | : NB5464http://data.ordnancesurvey.co.uk/id/1kmgridsquare/ Create a prefix for http://data.ordnancesurvey.co.uk/id/1kmgridsquare/ Hit Enter to save Double click to create a prefix | graph:default |