| 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Consistency and standards
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Help and documentation
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        User control and freedom
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Flexibility and efficiency of use
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Visibility of system status
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Error prevention
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Help users recognize, diagnose, and recover from errors
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Error prevention
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Match between system and the real world
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Aesthetic and minimalist design
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Help users recognize, diagnose, and recover from errors
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Match between system and the real world
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Recognition rather than recall
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Visibility of system status
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Help and documentation
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Recognition rather than recall
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Aesthetic and minimalist design
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        Consistency and standards
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Usability_Heuristics_for_User_Interface_Design
                                 | 
                                
                                    
                                        Flexibility and efficiency of use
                                    
                                 | 
                            
                        
                            
                                | 
                                    gptkb:Nielsen's_Heuristics
                                 | 
                                
                                    
                                        User control and freedom
                                    
                                 |