Hanna Führ
--- a/src/SQL2Linked/Implementations/ResourceTypeStructuralData.cs
+++ b/src/SQL2Linked/Implementations/ResourceTypeStructuralData.cs
+       
+            var graphs = new List<IGraph>();
+
+            foreach (var entry in entries)
+            {
+                var resourceTypeGraphName = $"{ResourceTypeUrlPrefix}/{entry.Id}";
+                var graph = RdfStoreConnector.GetGraph(resourceTypeGraphName);
+
+                // check if a triple with a dcat:DataService already exists in the resourcetype graph
+                var getTriples = graph.GetTriplesWithObject(DcatDataService);
+
+                if (!getTriples.Any())
+                {
+                    graph.Assert(
+                        new Triple(
+                            graph.CreateBlankNode(),