Corresponds to an HTML link's target attribute. See <http://www.w3.org/TR/html401/present/frames.html#adef-target>

| Enums ||
|---|---|
| `TARGET_WINDOW_UNSPECIFIED` | Default value. This value is unused. |
| `TOP` | Specifies that the link should open in the full body of the page. |
| `BLANK` | Specifies that the link should open in a new window. |