The TabInstance object manages transient state for the TabDefinition object. The attributes of the TabInstance object, in addition to the attributes inherited from the InstanceObject base class, are:
| Attribute | Description | 
|---|---|
| 
 | 
 | 
| 
 | Map indicating the panel stacks that are currently assigned to each layout cell in the browser. | 
| 
 | Map indicating the cell to which each panel stack is currently assigned in the browser. | 
| 
 | Identifier indicating the current next steps menu for the tab in the browser. | 
| 
 | Logical identifier for the corresponding  | 
| 
 | Indicates whether the tab is visible in the browser. | 

