Decision variables tab
The Decision Variables tab represents the
      unknown information in an optimization problem. It has a domain, which is a compact
      representation of the set of all possible values for the variable.
    Decision variable types are references to objects whose exact nature depends on the underlying optimizer of a model. This can also be declared in the data grid using the columns and the lists.
| Component | Required | Data type | Description | 
|---|---|---|---|
| Name | Yes | String | Label the decision variable as required for identification purposes. | 
| Variable | Yes | String | Declare the decision variable to use in writing the constraints or objective function. | 
| Dimension | Yes | Integer | This value must always be less than or equal to the number of variables declared
              on the Sets/Indices & Constant
                tab. Specify 0 if nothing needs to be declared.  | 
          
| Index | Yes | String | Specify only those variables that are declared under the Sets/Indices & Constant tab. Leave this blank for 0 value.  | 
          
| Domain | Yes | Dropdown | Select the domain for the model. For example, to capture cost related components, you want to assign Reals. |