         }
     }
     
-    /**
+    
     
     func writeXMLFile() throws {
         

    
     //MARK: - Persistent
    

    func readXMLFile() throws {
        
        //var error : NSError?

        // No implementation required for XMLFileStore
    }
    
    public func readNode(uid: UID?) -> Node? {
        if uid != nil {
           return self.nodeDict[uid!]
        }
        return nil
    }
    
    //MARK: - Relationship TOOD: see node 
    
    //var relationshipList = [Relationship]()
    var maxRelationshipUID : UID = 0
