Result values of the application's evaluation function (type Ucs_Nd_EvalCb_t). 
- Enumerator: 
- 
| UCS_ND_CHK_WELCOME | Node is ok, try to add it to the network.  |  | UCS_ND_CHK_UNIQUE | Test if this node is unique.  |  | UCS_ND_CHK_UNKNOWN | The node is unknown, no further action.  |