Represents the top border.
None.
      
        | Attribute | Type | Required | Description | Possible Values | 
      
        | val | htmlBorderValues | required | Gets or sets a border style. | nonesoliddoubledotteddashedridgegrooveoutsetinset
 | 
      
        | color | hexColorType | optional | Gets or sets a border color. |  | 
      
        | space | decimalNumberType | optional | Gets or sets a border space in eighths of a point. |  | 
      
        | shadow | onOffType | optional | Gets or sets a value indicating whether the border has a shadow. |  | 
      
        | frame | onOffType | optional | Gets or sets a value indicating whether the border is reversed to create a frame. |  | 
      
        | bdrwidth | Anonymous | optional | Gets or sets the HTML equivalent of the border width, in points. This number takes into account different internal border styles and represents the appropriate final presentation width. |  |