+-------------------------------+-------------------------------+
|      Topology YANG modules    |     Tunnel YANG modules       |
+-------------------------------+-------------------------------+
|  +------------------+         |                               |
|  |Network Topologies|         | +------+  +-----------+       |      
|  |       Model      |         | |Other |  | TE Tunnel |       |       
|  +--------+---------+         | |Tunnel|  +----+------+       |       
|           |   +---------+     | +------+       |              |       
|           +---+Service  |     |     +----------+---------+    |  
|           |   |Topology |     |     |          |         |    |
|           |   +---------+     |     |          |         |    |
|           |   +---------+     |+----+---+ +----+---+ +---+---+| 
|           +---+Layer 3  |     ||MPLS-TE | |RSVP-TE | | SR-TE ||  
|           |   |Topology |     || Tunnel | | Tunnel | |Tunnel ||  
|           |   +---------+     |+--------+ +--------+ +-------+| 
|           |   +---------+     |                               |  
|           +---+TE       |     |                               |   
|           |   |Topology |     |                               |    
|           |   +---------+     |                               |   
|           |   +---------+     |                               |  
|           +---+Layer 3  |     |                               |
|               |Topology |     |                               |    
|               +---------+     |                               |
+-------------------------------+-------------------------------+