A YANG Data Model for Wavelength Switched Optical Networks (WSONs)
RFC 9094

Document Type RFC - Proposed Standard (August 2021; No errata)
Authors Haomian Zheng  , Young Lee  , Aihua Guo  , Victor Lopez  , Daniel King 
Last updated 2021-08-13
Replaces draft-lee-ccamp-wson-yang
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Internet Engineering Task Force (IETF)                 郑好棉 (H. Zheng)
Request for Comments: 9094        华为技术有限公司 (Huawei Technologies)
Category: Standards Track                                         Y. Lee
ISSN: 2070-1721                                                  Samsung
                                                                  A. Guo
                                                               Futurewei
                                                                V. Lopez
                                                                   Nokia
                                                                 D. King
                                                 University of Lancaster
                                                             August 2021

   A YANG Data Model for Wavelength Switched Optical Networks (WSONs)

Abstract

   This document provides a YANG data model for the routing and
   wavelength assignment (RWA) TE topology in Wavelength Switched
   Optical Networks (WSONs).  The YANG data model defined in this
   document conforms to the Network Management Datastore Architecture
   (NMDA).

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc9094.

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction
     1.1.  Terminology and Notations
     1.2.  Tree Diagram
     1.3.  Prefix in Data Node Names
   2.  YANG Data Model (Tree Structure) for WSON Topology
   3.  YANG Module for WSON Topology
   4.  Security Considerations
   5.  IANA Considerations
   6.  References
     6.1.  Normative References
     6.2.  Informative References
   Contributors
   Authors' Addresses

1.  Introduction

   This document provides a YANG data model for the routing and
   wavelength assignment (RWA) Traffic Engineering (TE) topology in
   transparent Wavelength Switched Optical Networks (WSONs).  The YANG
   data model described in this document is a WSON technology-specific
   YANG data model based on the information model developed in [RFC7446]
   and the two encoding documents ([RFC7581] and [RFC7579]) that
   developed protocol-independent encodings based on [RFC7446].

   [ITU-Tg6982] defines amplified multichannel dense wavelength division
   multiplexing applications with single-channel optical interfaces.
   The YANG data model defined in this document refers to the standard
   application mode defined in [ITU-Tg6982].

   Neither impairment-aware optical networks nor flexi-grid are in scope
   for this document.  Refer to [OPT-IMPAIR-AWARE-YANG] for the
   impairment-aware optical network topology model and [FLEXI-GRID-YANG]
   for the flexi-grid optical network topology model.

   Additionally, neither transponder models nor resource block models
   (e.g., 3R) are in scope for this document.

   This document defines one YANG module: "ietf-wson-topology"
   (Section 3).  This document augments the generic TE topology
   specification [RFC8795].

   There are multiple applications for the YANG data model defined in
   this document.  For example, nodes within the network can use the
   data model to capture their understanding of the overall WSON
   topology and expose it to a controller.  A controller can further
   propagate the topology to other controllers.  The YANG data model is
   used by NETCONF [RFC6020] [RFC8341] or a RESTCONF [RFC8040] protocol.
   The YANG data model defined in this document conforms to the Network
   Management Datastore Architecture [RFC8342].

1.1.  Terminology and Notations

   Refer to [RFC7446] and [RFC7581] for the key terms used in this
   document.  The following terms are defined in [RFC7950] and are not
   redefined here:

   *  client

   *  server

   *  augment

   *  data model

   *  data node

   The following terms are defined in [RFC6241] and are not redefined
   here:

   *  configuration data

   *  state data

   The terminology for describing YANG data models is found in
   [RFC7950].

1.2.  Tree Diagram

   A simplified graphical representation of the data model is used in
   Section 2 of this document.  The meaning of the symbols in these
   diagrams is defined in [RFC8340].

1.3.  Prefix in Data Node Names

   In this document, names of data nodes and other data model objects
   are prefixed using the standard prefix associated with the
   corresponding YANG imported modules, as shown in the following table.

             +==========+=======================+===========+
             | Prefix   | YANG module           | Reference |
             +==========+=======================+===========+
             | l0-types | ietf-layer0-types     | [RFC9093] |
             +----------+-----------------------+-----------+
             | wsont    | ietf-wson-topology    | RFC 9094  |
             +----------+-----------------------+-----------+
             | nw       | ietf-network          | [RFC8345] |
             +----------+-----------------------+-----------+
             | nt       | ietf-network-topology | [RFC8345] |
             +----------+-----------------------+-----------+
             | tet      | ietf-te-topology      | [RFC8795] |
             +----------+-----------------------+-----------+

                         Table 1: Data Node Names

2.  YANG Data Model (Tree Structure) for WSON Topology

   module: ietf-wson-topology
     augment /nw:networks/nw:network/nw:network-types/tet:te-topology:
       +--rw wson-topology!
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes:
       +--rw wson-node!
          +--rw is-reconfigurable-node?   boolean
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction:
       +--rw grid-type?   identityref
       +--rw priority?    uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from/tet:label-restrictions
               /tet:label-restriction:
       +--rw grid-type?   identityref
       +--rw priority?    uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to/tet:label-restrictions
               /tet:label-restriction:
       +--rw grid-type?   identityref
       +--rw priority?    uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction:
       +--ro grid-type?   identityref
       +--ro priority?    uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from/tet:label-restrictions
               /tet:label-restriction:
       +--ro grid-type?   identityref
       +--ro priority?    uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to/tet:label-restrictions
               /tet:label-restriction:
       +--ro grid-type?   identityref
       +--ro priority?    uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:label-restrictions
               /tet:label-restriction:
       +--rw grid-type?   identityref
       +--rw priority?    uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:label-restrictions
               /tet:label-restriction:
       +--rw grid-type?   identityref
       +--rw priority?    uint8
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction:
       +--rw grid-type?   identityref
       +--rw priority?    uint8
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry/tet:label-restrictions
               /tet:label-restriction:
       +--ro grid-type?   identityref
       +--ro priority?    uint8
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction:
       +--rw grid-type?   identityref
       +--rw priority?    uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(wson)
          +--rw (l0-grid-type)?
             +--:(dwdm)
             |  +--rw wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--rw wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:underlay/tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:underlay/tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:optimizations/tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-exclude-objects
               /tet:route-object-exclude-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:optimizations/tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:path-properties/tet:path-route-objects
               /tet:path-route-object/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--rw (l0-grid-type)?
             +--:(dwdm)
             |  +--rw wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--rw wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--rw (l0-grid-type)?
             +--:(dwdm)
             |  +--rw wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--rw wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:underlay/tet:primary-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:underlay/tet:backup-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:optimizations/tet:algorithm
               /tet:metric/tet:optimization-metric
               /tet:explicit-route-exclude-objects
               /tet:route-object-exclude-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:optimizations/tet:algorithm
               /tet:metric/tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:path-properties
               /tet:path-route-objects/tet:path-route-object/tet:type
               /tet:label/tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(wson)
          +--ro (l0-grid-type)?
             +--:(dwdm)
             |  +--ro wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--ro wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:underlay/tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:underlay/tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:optimizations/tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-exclude-objects
               /tet:route-object-exclude-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:optimizations/tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:path-properties/tet:path-route-objects
               /tet:path-route-object/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--ro (l0-grid-type)?
             +--:(dwdm)
             |  +--ro wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--ro wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--ro (l0-grid-type)?
             +--:(dwdm)
             |  +--ro wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--ro wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:underlay/tet:primary-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:underlay/tet:backup-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:optimizations/tet:algorithm
               /tet:metric/tet:optimization-metric
               /tet:explicit-route-exclude-objects
               /tet:route-object-exclude-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:optimizations/tet:algorithm
               /tet:metric/tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix/tet:path-properties
               /tet:path-route-objects/tet:path-route-object/tet:type
               /tet:label/tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--rw (l0-grid-type)?
             +--:(dwdm)
             |  +--rw wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--rw wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:underlay
               /tet:primary-path/tet:path-element/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:underlay
               /tet:backup-path/tet:path-element/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:optimizations
               /tet:algorithm/tet:metric/tet:optimization-metric
               /tet:explicit-route-exclude-objects
               /tet:route-object-exclude-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:optimizations
               /tet:algorithm/tet:metric/tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:path-properties
               /tet:path-route-objects/tet:path-route-object/tet:type
               /tet:label/tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--rw (l0-grid-type)?
             +--:(dwdm)
             |  +--rw wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--rw wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:underlay
               /tet:primary-path/tet:path-element/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:underlay/tet:backup-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:optimizations
               /tet:algorithm/tet:metric/tet:optimization-metric
               /tet:explicit-route-exclude-objects
               /tet:route-object-exclude-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:optimizations
               /tet:algorithm/tet:metric/tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:path-properties
               /tet:path-route-objects/tet:path-route-object/tet:type
               /tet:label/tet:label-hop/tet:te-label/tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro (single-or-super-channel)?
             |     +--:(single)
             |     |  +--ro dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:underlay/tet:primary-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:underlay/tet:backup-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--rw (l0-grid-type)?
             +--:(dwdm)
             |  +--rw wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--rw wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--ro (grid-type)?
             +--:(dwdm)
             |  +--ro dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--ro cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--ro (l0-grid-type)?
             +--:(dwdm)
             |  +--ro wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--ro wson-cwdm-channel-spacing?   identityref
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes/tet:underlay/tet:primary-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes/tet:underlay/tet:backup-path
               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw (single-or-super-channel)?
             |     +--:(single)
             |     |  +--rw dwdm-n?              l0-types:dwdm-n
             |     +--:(super)
             |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?                    l0-types:cwdm-n
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-start/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(wson)
          +--rw (grid-type)?
             +--:(dwdm)
             |  +--rw dwdm-n?   l0-types:dwdm-n
             +--:(cwdm)
                +--rw cwdm-n?   l0-types:cwdm-n
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(wson)
          +--rw (l0-grid-type)?
             +--:(dwdm)
             |  +--rw wson-dwdm-channel-spacing?   identityref
             +--:(cwdm)
                +--rw wson-cwdm-channel-spacing?   identityref

3.  YANG Module for WSON Topology

   <CODE BEGINS> file "ietf-wson-topology@2021-08-13.yang"
   module ietf-wson-topology {
     yang-version 1.1;
     namespace "urn:ietf:params:xml:ns:yang:ietf-wson-topology";
     prefix wsont;

     import ietf-network {
       prefix nw;
       reference
         "RFC 8345: A YANG Data Model for Network Topologies";
     }

     import ietf-network-topology {
       prefix nt;
       reference
         "RFC 8345: A YANG Data Model for Network Topologies";
     }

     import ietf-te-topology {
       prefix tet;
       reference
         "RFC 8795: YANG Data Model for
          Traffic Engineering (TE) Topologies";
     }

     import ietf-layer0-types {
       prefix l0-types;
       reference
         "RFC 9093: A YANG Data Model for Layer 0 Types";
     }

     organization
       "IETF CCAMP Working Group";

     contact
       "WG Web: <https://datatracker.ietf.org/wg/ccamp/>
        WG List: <mailto:ccamp@ietf.org>

        Editor:   Haomian Zheng  <zhenghaomian@huawei.com>
        Editor:   Young Lee  <younglee.tx@gmail.com>
        Editor:   Aihua Guo  <aihuaguo.ietf@gmail.com>
        Editor:   Victor Lopez <victor.lopez@nokia.com>
        Editor:   Daniel King  <d.king@lancaster.ac.uk>";

     description
       "This module provides a YANG data model for the routing and
        wavelength assignment (RWA) Traffic Engineering (TE)
        topology in Wavelength Switched Optical Networks (WSONs).
        The YANG data model described in this document is a WSON
        technology-specific YANG data model augmenting the generic TE
        topology module (ietf-te-topology) based on the information
        model developed in RFC 7446 and the two encoding documents
        RFC 7579 and RFC 7581.

        Copyright (c) 2021 IETF Trust and the persons identified
        as authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with
        or without modification, is permitted pursuant to, and
        subject to the license terms contained in, the Simplified
        BSD License set forth in Section 4.c of the IETF Trust's
        Legal Provisions Relating to IETF Documents
        (https://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC 9094; see
        the RFC itself for full legal notices.";

     revision 2021-08-13 {
       description
         "Initial version";

       reference
         "RFC 9094: A YANG Data Model for Wavelength Switched
          Optical Networks (WSONs)";
     }

     /*
      * Data nodes
      */

     augment "/nw:networks/nw:network/nw:network-types"
           + "/tet:te-topology" {
       description
         "Augment network types to define the WSON topology type.";
       container wson-topology {
         presence "Its presence identifies the WSON topology type.";
         description
           "Introduce a new network type for WSON topology.";
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te"
           + "/tet:te-node-attributes" {
       when '/nw:networks/nw:network/nw:network-types'
          + '/tet:te-topology/wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE node attributes.";
       container wson-node {
         presence "The TE node is a WSON node.";
         description
           "WSON node attributes";
         leaf is-reconfigurable-node {
           type boolean;
           default "true";
           description
             "Indicates whether the WSON node is reconfigurable:
              - true: the node is reconfigurable, i.e.,
                it is representing a Reconfigurable Optical
                Add/Drop Multiplexer (ROADM) node;
              - false: the node is not reconfigurable, i.e.,
                it is representing a Fixed Optical Add/Drop
                Multiplexer (FOADM) node.";
         }
       }
     }

     /*
      * Augment TE label range information
      */

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:label-restrictions/tet:label-restriction" {
       when '../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the TE node
          connectivity matrices.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:from/"
           + "tet:label-restrictions/tet:label-restriction" {
       when '../../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the source LTP
          of the connectivity matrix entry.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:to/"
           + "tet:label-restrictions/tet:label-restriction" {
       when '../../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the destination LTP
          of the connectivity matrix entry.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/"
           + "tet:connectivity-matrices/tet:label-restrictions/"
           + "tet:label-restriction" {
       when '../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the TE node
          connectivity matrices information source.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:from/tet:label-restrictions/tet:label-restriction" {
       when '../../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the source LTP
          of the connectivity matrix entry information source.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:to/tet:label-restrictions/tet:label-restriction" {
       when '../../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the destination LTP
          of the connectivity matrix entry information source.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:label-restrictions/tet:label-restriction" {
       when '../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the Tunnel
          Termination Point (TTP) Local Link Connectivities.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:label-restrictions/tet:label-restriction" {
       when '../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the TTP
          Local Link Connectivity entry.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction" {
       when '../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the TE link.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:information-source-entry/"
           + "tet:label-restrictions/tet:label-restriction" {
       when '../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range information for the TE link
          information source.";
       uses l0-types:l0-label-range-info;
     }

     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction" {
       description
         "Augment TE label range information for the TE link template.";
       uses l0-types:l0-label-range-info;
     }

     /*
      * Augment TE label
      */

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the TE node
          connectivity matrices.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:label-restrictions/"
           + "tet:label-restriction/tet:label-end/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the TE node
          connectivity matrices.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:label-restrictions/"
           + "tet:label-restriction/tet:label-step/"
           + "tet:technology" {
       when '../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the TE node
          connectivity matrices.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:underlay/tet:primary-path/tet:path-element/"
           + "tet:type/tet:label/tet:label-hop/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path of the
          TE node connectivity matrices.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:underlay/tet:backup-path/tet:path-element/"
           + "tet:type/tet:label/tet:label-hop/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path of the
          TE node connectivity matrices.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-exclude-objects/"
           + "tet:route-object-exclude-object/"
           + "tet:type/tet:label/tet:label-hop/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the TE node connectivity
          matrices.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-include-objects/"
           + "tet:route-object-include-object/"
           + "tet:type/tet:label/tet:label-hop/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the TE node connectivity
          matrices.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:path-properties/tet:path-route-objects/"
           + "tet:path-route-object/tet:type/tet:label/tet:label-hop/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the TE node connectivity matrices.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:from/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the source LTP
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:from/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-end/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the source LTP
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:from/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-step/"
           + "tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the source LTP
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:to/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the destination LTP
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:to/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-end/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the destination LTP
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:to/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-step/"
           + "tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the destination LTP
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:underlay/tet:primary-path/tet:path-element/"
           + "tet:type/tet:label/tet:label-hop/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:underlay/tet:backup-path/tet:path-element/"
           + "tet:type/tet:label/tet:label-hop/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:optimizations/"
           + "tet:algorithm/tet:metric/tet:optimization-metric/"
           + "tet:explicit-route-exclude-objects/"
           + "tet:route-object-exclude-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/tet:optimizations/"
           + "tet:algorithm/tet:metric/tet:optimization-metric/"
           + "tet:explicit-route-include-objects/"
           + "tet:route-object-include-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:path-properties/tet:path-route-objects/"
           + "tet:path-route-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the connectivity matrix entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/"
           + "tet:connectivity-matrices/tet:label-restrictions/"
           + "tet:label-restriction/"
           + "tet:label-start/tet:te-label/tet:technology" {
       when '../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the TE node connectivity
          matrices information source.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/"
           + "tet:connectivity-matrices/tet:label-restrictions/"
           + "tet:label-restriction/"
           + "tet:label-end/tet:te-label/tet:technology" {
       when '../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the TE node connectivity
          matrices information source.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/"
           + "tet:connectivity-matrices/tet:label-restrictions/"
           + "tet:label-restriction/"
           + "tet:label-step/tet:technology" {
       when '../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the TE node connectivity
          matrices information source.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the TE node connectivity matrices of the information
          source entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the TE node connectivity matrices of the information
          source entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-exclude-objects/"
           + "tet:route-object-exclude-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the TE node connectivity matrices
          information source.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-include-objects/"
           + "tet:route-object-include-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the TE node connectivity matrices
          information source.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:path-properties/tet:path-route-objects/"
           + "tet:path-route-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the TE node connectivity matrices information source.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:from/tet:label-restrictions/"
           + "tet:label-restriction/"
           + "tet:label-start/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the source LTP
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }
     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:from/tet:label-restrictions/"
           + "tet:label-restriction/"
           + "tet:label-end/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the source LTP
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:from/tet:label-restrictions/"
           + "tet:label-restriction/"
           + "tet:label-step/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the source LTP
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:to/tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the destination LTP
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:to/tet:label-restrictions/tet:label-restriction/"
           + "tet:label-end/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the destination LTP
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:to/tet:label-restrictions/tet:label-restriction/"
           + "tet:label-step/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the destination LTP
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-exclude-objects/"
           + "tet:route-object-exclude-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the connectivity matrix entry
          information source.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-include-objects/"
           + "tet:route-object-include-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the connectivity matrix entry
          information source.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix/"
           + "tet:path-properties/tet:path-route-objects/"
           + "tet:path-route-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the connectivity matrix entry information source.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the TTP
          Local Link Connectivities.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-end/"
           + "tet:te-label/tet:technology" {
       when '../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the TTP
          Local Link Connectivities.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-step/"
           + "tet:technology" {
       when '../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the TTP
          Local Link Connectivities.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the TTP Local Link Connectivities.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the TTP Local Link Connectivities.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-exclude-objects/"
           + "tet:route-object-exclude-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the TTP Local Link
          Connectivities.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-include-objects/"
           + "tet:route-object-include-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the TTP Local Link
          Connectivities.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:path-properties/tet:path-route-objects/"
           + "tet:path-route-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the TTP Local Link Connectivities.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the TTP
          Local Link Connectivity entry.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-end/tet:te-label/tet:technology" {
       when '../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the TTP
          Local Link Connectivity entry.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-step/tet:technology" {
       when '../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the TTP
          Local Link Connectivity entry.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the TTP Local Link Connectivity entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the TTP Local Link Connectivity entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-exclude-objects/"
           + "tet:route-object-exclude-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the TTP Local Link
          Connectivity entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:optimizations/tet:algorithm/tet:metric/"
           + "tet:optimization-metric/"
           + "tet:explicit-route-include-objects/"
           + "tet:route-object-include-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the TTP Local Link
          Connectivity entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"
           + "tet:path-properties/tet:path-route-objects/"
           + "tet:path-route-object/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the TTP Local Link Connectivity entry.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }
     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:te-link-attributes/"
           + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the TE link.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:te-link-attributes/"
           + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       when '../../../../../../../../'
          + 'nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the TE link.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/tet:te-label/tet:technology" {
       when '../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the TE link.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-end/tet:te-label/tet:technology" {
       when '../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the TE link.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-step/tet:technology" {
       when '../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the TE link.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:information-source-entry/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/tet:te-label/tet:technology" {
       when '../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range start for the TE link
          information source.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:information-source-entry/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-end/tet:te-label/tet:technology" {
       when '../../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range end for the TE link
          information source.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:information-source-entry/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-step/tet:technology" {
       when '../../../../../../nw:network-types/tet:te-topology/'
          + 'wsont:wson-topology' {
         description
           "Augmentation parameters apply only for networks with
            WSON topology type.";
       }
       description
         "Augment TE label range step for the TE link
          information source.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }

     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes/"
           + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       description
         "Augment TE label hop for the underlay primary path
          of the TE link template.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes/"
           + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
           + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
       description
         "Augment TE label hop for the underlay backup path
          of the TE link template.";
       case wson {
         uses l0-types:wson-label-hop;
       }
     }

     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-start/tet:te-label/tet:technology" {
       description
         "Augment TE label range start for the TE link template.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-end/tet:te-label/tet:technology" {
       description
         "Augment TE label range end for the TE link template.";
       case wson {
         uses l0-types:wson-label-start-end;
       }
     }

     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction/"
           + "tet:label-step/tet:technology" {
       description
         "Augment TE label range step for the TE link template.";
       case wson {
         uses l0-types:wson-label-step;
       }
     }
   }
   <CODE ENDS>

4.  Security Considerations

   The YANG module specified in this document defines a schema for data
   that is designed to be accessed via network management protocols such
   as NETCONF [RFC6241] or RESTCONF [RFC8040].  The lowest NETCONF layer
   is the secure transport layer, and the mandatory-to-implement secure
   transport is Secure Shell (SSH) [RFC6242].  The lowest RESTCONF layer
   is HTTPS, and the mandatory-to-implement secure transport is TLS
   [RFC8446].

   The NETCONF protocol over Secure Shell (SSH) specification [RFC6242]
   describes a method for invoking and running NETCONF within a Secure
   Shell (SSH) session as an SSH subsystem.  The NETCONF access control
   model [RFC8341] provides the means to restrict access for particular
   NETCONF or RESTCONF users to a preconfigured subset of all available
   NETCONF or RESTCONF protocol operations and content.

   There are a number of data nodes defined in this YANG module that are
   writable/creatable/deletable (i.e., config true, which is the
   default).  These data nodes may be considered sensitive or vulnerable
   in some network environments.  Write operations (e.g., edit-config)
   to these data nodes without proper protection can have a negative
   effect on network operations.  Considerations in Section 8 of
   [RFC8795] are also applicable to the module defined in this document.

   Some of the readable data nodes in this YANG module may be considered
   sensitive or vulnerable in some network environments.  It is thus
   important to control read access (e.g., via get, get-config, or
   notification) to these data nodes.  Considerations in Section 8 of
   [RFC8795] are also applicable to the module defined in this document.

   Finally, the YANG module described in this document augments the
   "ietf-network" YANG module [RFC8345] and the "ietf-te-topology" YANG
   module [RFC8795] by adding data nodes.  The security considerations
   for the subtrees described in those RFCs apply equally to the new
   data nodes that this module adds.

5.  IANA Considerations

   IANA has assigned new URIs from the "IETF XML Registry" [RFC3688] as
   follows:

   URI:  urn:ietf:params:xml:ns:yang:ietf-wson-topology
   Registrant Contact:  The IESG
   XML:  N/A; the requested URI is an XML namespace.

   This document registers a YANG module in the "YANG Module Names"
   registry [RFC7950] [RFC6020].

   Name:  ietf-wson-topology
   Namespace:  urn:ietf:params:xml:ns:yang:ietf-wson-topology
   Prefix:  wsont
   Reference:  RFC 9094

6.  References

6.1.  Normative References

   [ITU-Tg6982]
              ITU-T, "Amplified multichannel dense wavelength division
              multiplexing applications with single channel optical
              interfaces", ITU-T Recommendation G.698.2, November 2018.

   [RFC6020]  Bjorklund, M., Ed., "YANG - A Data Modeling Language for
              the Network Configuration Protocol (NETCONF)", RFC 6020,
              DOI 10.17487/RFC6020, October 2010,
              <https://www.rfc-editor.org/info/rfc6020>.

   [RFC6241]  Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
              and A. Bierman, Ed., "Network Configuration Protocol
              (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
              <https://www.rfc-editor.org/info/rfc6241>.

   [RFC6242]  Wasserman, M., "Using the NETCONF Protocol over Secure
              Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
              <https://www.rfc-editor.org/info/rfc6242>.

   [RFC7579]  Bernstein, G., Ed., Lee, Y., Ed., Li, D., Imajuku, W., and
              J. Han, "General Network Element Constraint Encoding for
              GMPLS-Controlled Networks", RFC 7579,
              DOI 10.17487/RFC7579, June 2015,
              <https://www.rfc-editor.org/info/rfc7579>.

   [RFC7581]  Bernstein, G., Ed., Lee, Y., Ed., Li, D., Imajuku, W., and
              J. Han, "Routing and Wavelength Assignment Information
              Encoding for Wavelength Switched Optical Networks",
              RFC 7581, DOI 10.17487/RFC7581, June 2015,
              <https://www.rfc-editor.org/info/rfc7581>.

   [RFC7950]  Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
              RFC 7950, DOI 10.17487/RFC7950, August 2016,
              <https://www.rfc-editor.org/info/rfc7950>.

   [RFC8040]  Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
              Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
              <https://www.rfc-editor.org/info/rfc8040>.

   [RFC8340]  Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
              BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
              <https://www.rfc-editor.org/info/rfc8340>.

   [RFC8341]  Bierman, A. and M. Bjorklund, "Network Configuration
              Access Control Model", STD 91, RFC 8341,
              DOI 10.17487/RFC8341, March 2018,
              <https://www.rfc-editor.org/info/rfc8341>.

   [RFC8342]  Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
              and R. Wilton, "Network Management Datastore Architecture
              (NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
              <https://www.rfc-editor.org/info/rfc8342>.

   [RFC8345]  Clemm, A., Medved, J., Varga, R., Bahadur, N.,
              Ananthakrishnan, H., and X. Liu, "A YANG Data Model for
              Network Topologies", RFC 8345, DOI 10.17487/RFC8345, March
              2018, <https://www.rfc-editor.org/info/rfc8345>.

   [RFC8446]  Rescorla, E., "The Transport Layer Security (TLS) Protocol
              Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
              <https://www.rfc-editor.org/info/rfc8446>.

   [RFC8795]  Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and
              O. Gonzalez de Dios, "YANG Data Model for Traffic
              Engineering (TE) Topologies", RFC 8795,
              DOI 10.17487/RFC8795, August 2020,
              <https://www.rfc-editor.org/info/rfc8795>.

   [RFC9093]  Zheng, H., Lee, Y., Guo, A., Lopez, V., and D. King, "A
              YANG Data Model for Layer 0 Types", RFC 9093,
              DOI 10.17487/RFC9093, August 2021,
              <https://www.rfc-editor.org/info/rfc9093>.

6.2.  Informative References

   [FLEXI-GRID-YANG]
              Lopez de Vergara, J., Perdices Burrero, D., King, D., Lee,
              Y., and H. Zheng, "A YANG Data Model for Flexi-Grid
              Optical Networks", Work in Progress, Internet-Draft,
              draft-ietf-ccamp-flexigrid-yang-10, 12 July 2021,
              <https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
              flexigrid-yang-10>.

   [OPT-IMPAIR-AWARE-YANG]
              Lee, Y., Le Rouzic, E., Lopez, V., Galimberti, G., and D.
              Beller, "A YANG Data Model for Optical Impairment-aware
              Topology", Work in Progress, Internet-Draft, draft-ietf-
              ccamp-optical-impairment-topology-yang-07, 8 July 2021,
              <https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
              optical-impairment-topology-yang-07>.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              DOI 10.17487/RFC3688, January 2004,
              <https://www.rfc-editor.org/info/rfc3688>.

   [RFC7446]  Lee, Y., Ed., Bernstein, G., Ed., Li, D., and W. Imajuku,
              "Routing and Wavelength Assignment Information Model for
              Wavelength Switched Optical Networks", RFC 7446,
              DOI 10.17487/RFC7446, February 2015,
              <https://www.rfc-editor.org/info/rfc7446>.

Contributors

   Dhruv Dhody
   Huawei Technologies

   Email: dhruv.ietf@gmail.com

   Bin Yeong Yoon
   ETRI

   Email: byyun@etri.re.kr

   Ricard Vilalta
   CTTC

   Email: vricard.vilalta@cttc.es

   Italo Busi
   Huawei Technologies

   Email: Italo.Busi@huawei.com

Authors' Addresses

   Haomian Zheng
   Huawei Technologies
   H1, Huawei Xiliu Beipo Village, Songshan Lake
   Dongguan
   Guangdong, 523808
   China

   Email: zhenghaomian@huawei.com

   Additional contact information:

      郑好棉
      中国
      523808
      广东 东莞
      松山湖华为溪流背坡村H1
      华为技术有限公司

   Young Lee
   Samsung
   South Korea

   Email: younglee.tx@gmail.com

   Aihua Guo
   Futurewei

   Email: aihuaguo.ietf@gmail.com

   Victor Lopez
   Nokia

   Email: victor.lopez@nokia.com

   Daniel King
   University of Lancaster

   Email: d.king@lancaster.ac.uk