| 
                        Depth Stack
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                    
                        has top
                     | 
                    
                        Surface
                     | 
                    
                        DDQUD.Subsurface.FormationTop
                     | 
                
                
                    | 
                        3D property grid
                     | 
                    
                        DDQUD.Subsurface.PropertyCube3D
                     | 
                    
                        has a
                     | 
                    
                        Impedance #1
                     | 
                    
                        DDQUD.Drilling.Parameter
                     | 
                
                
                    | 
                        Geomodel #1
                     | 
                    
                        DDQUD.Subsurface.GeoModel
                     | 
                    
                        has a
                     | 
                    
                        Depth Stack #1
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                
                
                    | 
                        Depth Stack #3
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                    
                        is a
                     | 
                    
                        Depth Stack
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                
                
                    | 
                        3D property grid
                     | 
                    
                        DDQUD.Subsurface.PropertyCube3D
                     | 
                    
                        has a
                     | 
                    
                        AVO #1
                     | 
                    
                        DDQUD.Drilling.Parameter
                     | 
                
                
                    | 
                        3D property grid
                     | 
                    
                        DDQUD.Subsurface.PropertyCube3D
                     | 
                    
                        has a
                     | 
                    
                        Coherence #1
                     | 
                    
                        DDQUD.Drilling.Parameter
                     | 
                
                
                    | 
                        Basin #1
                     | 
                    
                        DDQUD.Subsurface.RockVolume
                     | 
                    
                        is described by
                     | 
                    
                        Depth Stack #3
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                
                
                    | 
                        TWT Stack #1
                     | 
                    
                        DDQUD.Subsurface.Seismic
                     | 
                    
                        is a
                     | 
                    
                        Seismic cube #1
                     | 
                    
                        DDQUD.Subsurface.Seismic
                     | 
                
                
                    | 
                        Depth Stack #1
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                    
                        has top
                     | 
                    
                        Surface #1
                     | 
                    
                        DDQUD.Subsurface.FormationTop
                     | 
                
                
                    | 
                        Geomodel #1
                     | 
                    
                        DDQUD.Subsurface.GeoModel
                     | 
                    
                        has a
                     | 
                    
                        Depth Stack #3
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                
                
                    | 
                        Reservoir #1
                     | 
                    
                        DDQUD.Subsurface.RockVolume
                     | 
                    
                        is described by
                     | 
                    
                        Depth Stack #2
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                
                
                    | 
                        Depth Stack #2
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                    
                        is a
                     | 
                    
                        Depth Stack
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                
                
                    | 
                        TVT parameter #N
                     | 
                    
                        DDQUD.Drilling.Parameter
                     | 
                    
                        has a
                     | 
                    
                        Uncertainty map #N
                     | 
                    
                        DDQUD.Drilling.Uncertainty
                     | 
                
                
                    | 
                        3D property grid
                     | 
                    
                        DDQUD.Subsurface.PropertyCube3D
                     | 
                    
                        has a
                     | 
                    
                        Amplitude #1
                     | 
                    
                        DDQUD.Drilling.Parameter
                     | 
                
                
                    | 
                        Geomodel #1
                     | 
                    
                        DDQUD.Subsurface.GeoModel
                     | 
                    
                        has a
                     | 
                    
                        TWT Stack #1
                     | 
                    
                        DDQUD.Subsurface.Seismic
                     | 
                
                
                    | 
                        TWT Stack #1
                     | 
                    
                        DDQUD.Subsurface.Seismic
                     | 
                    
                        has a
                     | 
                    
                        3D property grid
                     | 
                    
                        DDQUD.Subsurface.PropertyCube3D
                     | 
                
                
                    | 
                        Depth Stack
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                    
                        has a
                     | 
                    
                        Layer #N
                     | 
                    
                        DDQUD.Subsurface.Formation
                     | 
                
                
                    | 
                        Overburden #1
                     | 
                    
                        DDQUD.Subsurface.RockVolume
                     | 
                    
                        is described by
                     | 
                    
                        Depth Stack #1
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                
                
                    | 
                        Layer #N
                     | 
                    
                        DDQUD.Subsurface.Formation
                     | 
                    
                        has a
                     | 
                    
                        TVT parameter #N
                     | 
                    
                        DDQUD.Drilling.Parameter
                     | 
                
                
                    | 
                        Depth Stack #1
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                    
                        is a
                     | 
                    
                        Depth Stack
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     | 
                
                
                    | 
                        Geomodel #1
                     | 
                    
                        DDQUD.Subsurface.GeoModel
                     | 
                    
                        has a
                     | 
                    
                        Depth Stack #2
                     | 
                    
                        DDQUD.Subsurface.DepthStack
                     |