adding yang corresponding to the json inputs

Signed-off-by: EstherLerouzic <esther.lerouzic@orange.com>
Change-Id: I75b0cc3c3ce84dc724e588f918bddf0a5a97225d

gnpy/yang/gnpy-api@2020-10-22.yang

@@ -0,0 +1,53 @@
+module gnpy-api {
+  yang-version 1.1;
+  namespace "gnpy:gnpy-api";
+  prefix gnpyapi;
+
+  import gnpy-network-topology {
+    prefix gnpynt;
+  }
+  import gnpy-path-computation-simplified {
+    prefix gnpypc;
+  }
+  import gnpy-eqpt-config {
+    prefix gnpyeqpt;
+  }
+
+  organization
+    "Telecom Infra Project OOPT PSE Working Group";
+  contact
+    "WG Web:   <https://github.com/Telecominfraproject/oopt-gnpy>
+     contact:  <mailto:ahmed.triki@orange.com>
+     contact:  <mailto:esther.lerouzic@orange.com>
+    ";
+  description
+    "YANG model for gnpy api input for path computation - TransportPCE preversion";
+
+  revision 2020-10-22 {
+    description
+      "draft for experimental/2020-candi";
+    reference
+      "YANG model for api input for path computation with gnpy";
+  }
+
+    container service {
+      description
+        "Describe the service file to connect to gnpy";
+      uses gnpypc:service;
+    }
+    container result {
+     uses gnpypc:result;
+     description
+     "Describe the response object to gnpy";
+    }
+    container topology {
+      description
+        "Describe the topology file to connect to gnpy";
+      uses gnpynt:topo;
+    }
+    container equipment {
+      description
+        "Describe the equipment library to connect to gnpy";
+      uses gnpyeqpt:eqpt;
+    }
+}

gnpy/yang/gnpy-eqpt-config@2020-10-22.yang

@@ -0,0 +1,442 @@
+module gnpy-eqpt-config {
+  yang-version 1;
+  namespace "gnpy:gnpy-eqpt-config";
+
+  prefix "gnpyeqpt";
+
+  organization
+    "Telecom Infra Project OOPT PSE
+     Working Group";
+
+  contact
+    "WG Web:   <https://github.com/Telecominfraproject/oopt-gnpy>
+     contact:  <mailto:ahmed.triki@orange.com>
+     contact:  <mailto:esther.lerouzic@orange.com>
+   ";
+
+  description "Base YANG model for gnpy equipment library input for path computation - transportPCE preversion";
+
+  revision "2020-10-22" {
+    description "draft for experimental/2020-candi";
+    reference "Base YANG model for equipment library input for path computation with gnpy";
+  }
+
+  /*
+   * Identities
+
+
+  identity edfa-type-def {
+    description "base identity for variable gain and fixed gain";
+  }
+
+  identity variable-gain{
+    base edfa-type-def ;
+    description "'variable_gain' is a simplified model simulating a 2-coil 
+      EDFA with internal, input and output VOAs. The NF vs gain response is calculated 
+      accordingly based on the input parameters: nf_min, nf_max, and gain_flatmax. It 
+      is not a simple interpolation but a 2-stage NF calculation.";
+  }
+
+  identity fixed-gain{
+    base edfa-type-def ;
+    description "'fixed_gain' is a fixed gain model. NF == Cte == nf0 if gain_min < gain < gain_flatmax";
+  }
+
+  identity fiber-variety {
+    description "base identity for fiber variety";
+  }
+
+  identity transceiver-variety {
+    description "base identity for transceiver variety";
+  }
+
+  */
+  grouping variable-gain {
+    leaf nf_min {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units dB;
+    }
+    leaf nf_max {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units dB;
+    }
+    leaf out_voa_auto{
+      type boolean ;
+      description "auto_design feature to optimize the amplifier output VOA. If true, output VOA is present 
+      and will be used to push amplifier gain to its maximum, within EOL power margins.";
+    }
+  }
+
+  grouping fixed-gain{
+    leaf nf0 {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units dB;
+    }
+  }
+
+  grouping no-type-def{
+    leaf advanced_config_from_json {
+      type string ;
+      description " filename with json edfa";
+      
+    }
+  }
+  
+
+  grouping openroadm{
+    leaf-list nf_coef {
+      type decimal64 {
+        fraction-digits 5;
+      }
+      //default [8.1e-4,6.142e-2,1.558,19.97] ;
+    }
+  }
+
+  grouping dual-stage {
+    leaf raman {
+      type boolean;
+    }
+    leaf preamp_variety {
+      type leafref {
+          path "../../Edfa/type_variety";
+        }
+    }
+    leaf booster_variety {
+      type leafref {
+          path "../../Edfa/type_variety";
+        }
+    }
+  }
+
+  grouping edfa-common {
+    leaf allowed_for_design{
+      type boolean ;
+      description "If false, the amplifier will not be picked by auto-design but it can still be used as a 
+      manual input (from JSON or Excel template topology files.)";
+    }
+    leaf gain_flatmax {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units dB;
+    }
+    leaf gain_min {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units dB;
+    }
+    leaf p_max {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units dBm;
+    }
+    leaf type_def {
+      type identityref{
+        base edfa-type-def ;
+      }
+    }
+    choice type_of_model {
+      case variable-gain {
+        when "type_def = 'variable-gain'";
+        uses variable-gain ;
+      }
+      case fixed-gain{
+        when "type_def = 'fixed-gain'";
+        uses fixed-gain;
+      }
+      case no-type-def{
+        when "type_def = 'no-type-def'";
+        uses no-type-def;
+      }
+      case openroadm{
+        when "type_def = 'openroadm'";
+        uses openroadm;
+      }
+      case dual_stage {
+        when "type_def = 'dual_stage'";
+        uses dual-stage ;
+      }
+    }
+  }
+
+  grouping common-fiber {
+    description "common parameters for fiber and raman fiber";
+    leaf type_variety {
+      type string ;
+      }
+      description "a unique name to ID the fiber in the JSON or Excel template topology input file";
+    leaf dispersion{
+      type decimal64 {
+        fraction-digits 8;
+      }
+      units s.m-1.m-1;
+    }
+    leaf gamma{
+      type decimal64 {
+        fraction-digits 8;
+      }
+      units w-2.m-1 ;
+      description "2pi.n2/(lambda*Aeff) (w-2.m-1)";
+    }
+    leaf pmd_coef{
+      type decimal64 {
+        fraction-digits 16;
+      }
+      units s.m-0.5;
+    }      
+  }
+
+  grouping eqpt{
+    list Edfa {
+      key type_variety;
+      leaf type_variety {
+        type string;
+        description "a unique name to ID the amplifier in the JSON/Excel template topology input file";
+      }
+      uses edfa-common;
+    }
+
+    list Fiber {
+      key type_variety;
+      uses common-fiber;
+    }
+
+    list RamanFiber {
+      uses common-fiber;
+      container raman_efficiency {
+        leaf-list cr {
+          type decimal64 {
+            fraction-digits 8;
+          }
+        }
+        leaf-list frequency_offset {
+          type decimal64 {
+            fraction-digits 8;
+          }
+        }
+      }
+    }
+
+    list Span {
+      leaf power_mode {
+        type boolean ;
+      }
+      leaf-list delta_power_range_db {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf max_length {
+        type decimal64 {
+          fraction-digits 2;
+        }
+        units km;
+        default 150.0 ;
+      }
+      leaf max_loss {
+        type decimal64 {
+          fraction-digits 2;
+        }
+        units dB;
+      }
+      leaf max_fiber_lineic_loss_for_raman {
+        type decimal64 {
+          fraction-digits 2;
+        }
+        units dB.km-1;      
+      }
+      leaf target_extended_gain {
+        type decimal64 {
+          fraction-digits 2;
+        }
+        units dB;
+      }
+      leaf length_units{
+        type string ;
+        default "km";
+      }
+      leaf padding{
+        type decimal64 {
+          fraction-digits 2;
+        }
+        default 10.0 ;
+      }
+      leaf EOL{
+         type decimal64 {
+          fraction-digits 2;
+        }
+        default 0.0 ;
+      }
+      leaf con_in{
+        type decimal64 {
+          fraction-digits 2;
+        }
+        default 0.0 ;
+      }
+      leaf con_out{
+        type decimal64 {
+          fraction-digits 2;
+        }    
+        default 0.0 ;
+      }
+    }
+
+    list Roadm {
+      leaf target_pch_out_db {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf add_drop_osnr {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf pmd {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      container restrictions {
+        leaf-list preamp_variety_list {
+          type string;
+        }
+        leaf-list booster_variety_list {
+          type string;
+        }
+      }
+    }
+
+    list SI {
+      leaf f_min {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf f_max {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf baud_rate {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf spacing {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf power_dbm {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf-list power_range_db {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf roll_off {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf tx_osnr {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      leaf sys_margins {
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+    }
+
+    list Transceiver {
+      leaf type_variety {
+        type string ;
+        description "a unique name to ID the transceiver in the JSON or Excel template topology input file";
+      }
+      container frequency {
+        leaf min {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          units Hz ;
+        }
+        leaf max {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          units Hz ;
+        }
+        description "Min/max frequency of transponder eg 191.35e12  and 196.1e12";
+      }
+      list mode {
+        leaf format {
+          type string ;
+          description "unique name of the mode";
+        }
+        leaf baud_rate {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          units baud ;
+          description "baud_rate";
+        }
+        leaf OSNR {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          units dB ;
+          description "min required OSNR in 0.1nm (dB)";
+        }
+        leaf tx_osnr {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          units dB ;
+          description "min required OSNR in 0.1nm (dB)";
+        }
+        leaf min_spacing {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          units GHz ;
+          description "...";
+        }    
+        leaf bit_rate {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          units bit/s ;
+          description "bit rate";
+        }
+        leaf roll_off {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          description "...";
+        }
+        leaf cost {
+          type decimal64 {
+              fraction-digits 2;
+            }
+          description "arbitrary unit";
+        }
+      }
+    }
+  }
+}
+

gnpy/yang/gnpy-network-topology@2020-10-22.yang

@@ -0,0 +1,293 @@
+module gnpy-network-topology {
+  yang-version 1.1;
+  namespace "gnpy:gnpy-network-topology";
+  prefix gnpynt;
+
+  organization
+    "Telecom Infra Project OOPT PSE Working Group";
+  contact
+    "WG Web:   <https://github.com/Telecominfraproject/oopt-gnpy>
+     contact:  <mailto:ahmed.triki@orange.com>
+     contact:  <mailto:esther.lerouzic@orange.com>
+    ";
+  description
+    "YANG model for gnpy network input for path computation - transportPCE preversion";
+
+  revision 2020-10-22 {
+    description
+      "draft for experimental/2020-candi";
+    reference
+      "YANG model for network input for path computation with gnpy";
+  }
+
+  identity type-element {
+    description
+      "Base identity for element type";
+  }
+
+  identity Transceiver {
+    base type-element;
+    description
+      " Transceiver element";
+  }
+
+  identity Fiber {
+    base type-element;
+    description
+      "Fiber element";
+  }
+
+  identity Roadm {
+    base type-element;
+    description
+      "Roadm element";
+  }
+
+  identity Edfa {
+    base type-element;
+    description
+      "Edfa element";
+  }
+
+  identity Fused {
+    base type-element;
+    description
+      "Fused element";
+  }
+
+  identity length-unit {
+    description
+      "length unit";
+  }
+
+  identity km {
+    base length-unit;
+    description
+      "kilometers";
+  }
+
+  identity m {
+    base length-unit;
+    description
+      "meter";
+  }
+
+  typedef Coordinate {
+    type decimal64 {
+      fraction-digits 6;
+    }
+  }
+
+  typedef Coef {
+    type decimal64 {
+      fraction-digits 2;
+    }
+  }
+
+  grouping location-attributes {
+    container location {
+      leaf city {
+        type string;
+        mandatory true;
+      }
+      leaf region {
+        type string;
+        mandatory true;
+      }
+      leaf latitude {
+        type Coordinate;
+        mandatory true;
+      }
+      leaf longitude {
+        type Coordinate;
+        mandatory true;
+      }
+    }
+  }
+
+  grouping fiber-params {
+    description
+      ".....";
+    leaf length {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      mandatory true;
+    }
+    leaf loss_coef {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      mandatory true;
+    }
+    leaf length_units {
+      type identityref {
+        base length-unit;
+      }
+      mandatory true;
+    }
+    leaf att_in {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      mandatory true;
+    }
+    leaf con_in {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      mandatory true;
+    }
+    leaf con_out {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      mandatory true;
+    }
+  }
+
+  grouping edfa-params {
+    container operational {
+      description
+        "Operational values for the Edfa ";
+      leaf gain_target {
+        type decimal64 {
+          fraction-digits 2;
+        }
+        units "dB";
+        mandatory true;
+        description
+          "..";
+      }
+      leaf tilt_target {
+        type decimal64 {
+          fraction-digits 2;
+        }
+        mandatory true;
+        description
+          "..";
+      }
+      leaf out_voa {
+        type decimal64 {
+          fraction-digits 2;
+        }
+        units "dB";
+        mandatory true;
+        description
+          "..";
+      }
+      leaf delta_p {
+        type decimal64 {
+          fraction-digits 2;
+        }
+        units "dB";
+        mandatory true;
+        description
+          "..";
+      }
+    }
+  }
+
+  grouping roadm-params {
+    leaf target_pch_out_db {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units "dB";
+      description
+        "..";
+    }
+    container restrictions {
+      leaf-list preamp_variety_list {
+        type string;
+        description 
+          "List of authorized preamp type-variety";
+      }
+      leaf-list booster_variety_list {
+        type string;
+        description 
+          "List of authorized booster type-variety";
+      }
+    }
+  }
+
+  grouping transceiver-params;
+
+  grouping fused-params{
+    leaf loss {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units "dB";
+      description
+        "Concentrated loss of the fused element";    
+    }
+  }
+
+  grouping element-type-choice {
+    choice element-type {
+      case Edfa {
+        when "type = 'Edfa'";
+        uses edfa-params;
+      }
+      case FiberRoadm {
+        container params {
+          choice fiberroadmfused {
+            case Fiber {
+              when "type = 'Fiber'";
+              uses fiber-params;
+            }
+            case Roadm {
+              when "type = 'Roadm'";
+              uses roadm-params;
+            }
+            case Fused {
+              when "type = 'Fused'";
+              uses fused-params;
+            }
+          }
+        }
+      }
+      case Transceiver {
+        when "type = 'Transceiver'";
+      }
+    }
+  }
+
+
+  grouping topo {
+    list elements {
+      key "uid";
+      leaf uid {
+        type string;
+      }
+      leaf type {
+        type identityref {
+          base type-element;
+        }
+        mandatory true;
+      }
+      leaf type_variety {
+        type string;
+        mandatory false;
+      }
+      container metadata {
+        uses location-attributes;
+      }
+      uses element-type-choice;
+    }
+    list connections {
+      config false;
+      leaf from_node {
+        type leafref {
+          path "../../elements/uid";
+        }
+      }
+      leaf to_node {
+        type leafref {
+          path "../../elements/uid";
+        }
+      }
+    }
+  }
+}

gnpy/yang/gnpy-path-computation-simplified@2020-10-22.yang

@@ -0,0 +1,559 @@
+module gnpy-path-computation-simplified {
+  yang-version 1.1;
+  namespace "gnpy:path";
+
+  prefix "gnpypc";
+
+    organization
+    "Telecom Infra Project OOPT PSE Working Group";
+
+  contact
+    "WG Web:   <https://github.com/Telecominfraproject/oopt-gnpy>
+     contact:  <mailto:ahmed.triki@orange.com>
+     contact:  <mailto:esther.lerouzic@orange.com>
+   ";
+
+  description "YANG model for gnpy path computation simplified for transportPCE";
+
+  revision "2020-10-22" {
+    description 
+      "draft for experimental/2020-candi";
+    reference 
+      "YANG model for path computation with gnpy inputs";
+  }
+
+  grouping effective-freq-slot{
+         /* content copied from ietf-flexi-grid-media-channel, because only M and N are needed
+            from the initial grouping.
+         */
+         description "The effective frequency slot is an attribute
+            of a media channel and, being a frequency slot, it is
+            described by its nominal central frequency and slot
+            width";
+         reference "rfc7698";
+            leaf N {
+              type uint32;
+              description
+                  "Is used to determine the Nominal Central
+                  Frequency. The set of nominal central frequencies
+                  can be built using the following expression:
+                     f = 193.1 THz + n x 0.00625 THz,
+                  where 193.1 THz is ITU-T ''anchor frequency'' for
+                  transmission over the C band, n is a positive or
+                  negative integer including 0.";
+               reference "rfc7698";
+            }
+            leaf M {
+              type int32;
+              description
+                  "Is used to determine the slot width. A slot width
+                  is constrained to be M x SWG (that is, M x 12.5 GHz),
+                  where M is an integer greater than or equal to 1.";
+               reference "rfc7698";
+    }
+  }
+
+  grouping gnpy-specific-parameters{
+    description
+      "This grouping defines the gnpy specific parameters for requests.";
+        leaf technology {
+            type string;
+            default "flexi-grid";
+            description
+          "Data plane technology type.";
+          }
+      leaf trx_type {
+        type string ;
+        mandatory true;
+        description "name of the transponder type (to be read from equipment library";
+
+      }
+      leaf trx_mode {
+        type string;
+        description "name of the transponder mode (to be read from equipment library";
+
+      }
+      list effective-freq-slot {
+        key "N";
+        uses effective-freq-slot ;
+      }
+      leaf spacing {
+        mandatory true;
+        type decimal64 {
+          fraction-digits 1;
+        }
+        units Hz;
+        description
+          "It is the spacing between channels assuming full load with
+          same channels as the requested one. multiple of 12.5 GHz";
+
+      }
+      leaf max-nb-of-channel{
+        type int32;
+        description "Nb of channel to take into account for the full load case.
+        ";
+
+      }
+      leaf output-power{
+        type decimal64 {
+          fraction-digits 5;
+        }
+        units W;
+        description "optical power setting to be used for the propagation";
+
+      }
+      leaf path_bandwidth{
+        type decimal64 {
+          fraction-digits 5;
+        }
+        mandatory true;
+        units bit/s;
+        description "Capacity required";
+      }
+  }
+
+  identity SNR-bandwidth {
+    base path-metric-type;
+    description
+      "A metric that records SNR in signal bandwidth";
+  }
+
+  identity OSNR-bandwidth {
+    base path-metric-type;
+    description
+      "A metric that records OSNR in signal bandwidth";
+  }
+
+  identity SNR-0.1nm {
+    base path-metric-type;
+    description
+      "A metric that records SNR in 0.1nm";
+  }
+
+  identity OSNR-0.1nm {
+    base path-metric-type;
+    description
+      "A metric that records OSNR in 0.1nm";
+  }
+
+  identity reference_power {
+    base path-metric-type;
+    description
+      "to be revised";
+  }
+
+  identity path_bandwidth {
+     base path-metric-type;
+     description
+       "to be revised";
+  }
+
+  grouping transponder{
+        leaf transponder-type {
+        type string ;
+        description
+          "transponder type.";
+          }
+      leaf transponder-mode {
+        type string ;
+        description
+          "transponder mode.";
+          }
+  }
+
+  grouping hop-attribute{
+    description
+      "This grouping defines the hop attribute parameters for request or response";
+    choice hop-type{
+      case tsp {
+        container transponder{
+          uses transponder ;
+        }
+      }
+      case regen {
+        container regenerator{
+          leaf regenerator-id{
+            type string ;
+          }
+          uses transponder ;
+        }
+      }
+      case pow {
+        container optical-power{
+          leaf optical-power{
+            type decimal64 {
+              fraction-digits 5;
+            }
+            units W;
+            description "not used yet. hop output (input??) power";
+          }
+        }
+      }
+    }
+
+  }
+
+  identity path-metric-type {
+    description
+      "Base identity for path metric type";
+  }
+
+  identity route-usage-type {
+    description
+      "Base identity for route usage";
+  }
+
+  identity route-include-ero {
+    base route-usage-type;
+    description
+      "Include ERO from route";
+  }
+
+  identity route-exclude-ero {
+    base route-usage-type;
+    description
+      "Exclude ERO from route";
+  }
+
+  identity route-exclude-srlg {
+    base route-usage-type;
+    description
+      "Exclude SRLG from route";
+  }
+
+  typedef te-hop-type {
+    type enumeration {
+      enum LOOSE {
+        description
+          "loose hop in an explicit path";
+      }
+      enum STRICT {
+        description
+          "strict hop in an explicit path";
+      }
+    }
+    description
+     "enumerated type for specifying loose or strict
+      paths";
+    reference "RFC3209: section-4.3.2";
+  }
+
+  typedef te-path-disjointness {
+    type bits {
+      bit node {
+        position 0;
+        description "Node disjoint.";
+      }
+      bit link {
+        position 1;
+        description "Link disjoint.";
+      }
+      bit srlg {
+        position 2;
+        description "SRLG (Shared Risk Link Group) disjoint.";
+      }
+    }
+    description
+      "Type of the resource disjointness for a TE tunnel path.";
+    reference
+      "RFC4872: RSVP-TE Extensions in Support of End-to-End
+       Generalized Multi-Protocol Label Switching (GMPLS)
+       Recovery";
+  } // te-path-disjointness
+
+    typedef accumulated-metric-type {
+      type union {
+        type uint64;
+        type decimal64 {
+          fraction-digits 2;
+        }
+      }
+      description
+          "type useable for accumulative-value";
+  }
+
+  grouping path-route-objects {
+    description
+      "List of EROs to be included or excluded when performing
+       the path computation.";
+    container explicit-route-objects {
+      description
+        "Container for the route object list";
+      list route-object-include-exclude {
+        description
+          "List of explicit route objects to include or
+           exclude in path computation";
+        leaf explicit-route-usage {
+          type identityref {
+            base route-usage-type;
+          }
+          description "Explicit-route usage.";
+        }
+        key "index";
+        uses explicit-route-hop ;
+      }
+    }
+  }
+
+  grouping generic-path-disjointness {
+    description "Path disjointness grouping";
+    leaf disjointness {
+      type te-path-disjointness;
+      description
+        "The type of resource disjointness.
+         Under primary path, disjointness level applies to
+         all secondary LSPs. Under secondary, disjointness
+         level overrides the one under primary";
+    }
+  }
+
+  grouping common-path-constraints-attributes {
+    description
+      "Common path constraints configuration grouping";
+    uses common-constraints_config;
+  }
+
+  grouping generic-path-constraints {
+    description
+      "Global named path constraints configuration
+      grouping";
+    container path-constraints {
+      description "TE named path constraints container";
+      uses common-path-constraints-attributes;
+    }
+  }
+
+
+  grouping explicit-route-hop {
+    description
+      "The explicit route subobject grouping";
+    leaf index {
+      type uint32;
+      description "ERO subobject index";
+    }
+    choice type {
+      description
+        "The explicit route subobject type";
+      case num-unnum-hop {
+        container num-unnum-hop {
+          leaf node-id {
+            //type te-node-id;
+            type string;
+            description
+              "The identifier of a node in the TE topology.";
+          }
+          leaf link-tp-id {
+            //type te-tp-id;
+            type string;
+            description
+              "TE link termination point identifier. The combination
+              of TE link ID and the TE node ID is used to identify an
+              unnumbered TE link.";
+          }
+          leaf hop-type {
+            type te-hop-type;
+            description "strict or loose hop";
+          }
+          description
+            "Numbered and Unnumbered link/node explicit route
+            subobject";
+        }
+      }
+      case label {
+        container label-hop {
+          description "Label hop type";
+          uses effective-freq-slot;
+        }
+        description
+          "The Label ERO subobject";
+      }
+      case hop-attribute{
+        uses gnpypc:hop-attribute ;
+      }
+    }
+  }
+
+  grouping common-constraints_config {
+    description
+      "Common constraints grouping that can be set on
+       a constraint set or directly on the tunnel";
+
+    container te-bandwidth {
+      uses gnpy-specific-parameters ;
+      description
+        "A requested bandwidth to use for path computation";
+    }
+  }
+
+  grouping end-points {
+    description
+      "Common grouping to define the TE tunnel end-points";
+
+    leaf source {
+      type string;
+      description "TE tunnel source address.";
+    }
+    leaf destination {
+      type string;
+      description "P2P tunnel destination address";
+    }
+    leaf src-tp-id {
+      type string;
+      description "TE tunnel source termination point identifier.";
+    }
+    leaf dst-tp-id {
+      type string;
+      description "TE tunnel destination termination point
+    identifier.";
+    }
+  }
+
+  grouping synchronization-info {
+    description "Information for sync";
+    list synchronization {
+      key "synchronization-id";
+      description "sync list";
+      leaf synchronization-id {
+        type string;
+        description "index";
+      }
+      container svec {
+        description
+         "Synchronization VECtor";
+        leaf relaxable {
+          type boolean;
+          default true;
+          description
+            "If this leaf is true, path computation process is free
+            to ignore svec content.
+            otherwise it must take into account this svec.";
+        }
+        uses generic-path-disjointness;
+        leaf-list request-id-number {
+          type string;
+          description "This list reports the set of M path computation requests that must be synchronized.";
+        }
+      }
+    }
+  }
+
+  grouping path-metric {
+    description "TE path metric type";
+    leaf metric-type {
+      type identityref {
+        base path-metric-type;
+      }
+      description "TE path metric type";
+    }
+    leaf accumulative-value {
+      type decimal64 {
+          fraction-digits 2;
+      }
+      description "TE path metric accumulative value";
+    }
+  }
+  grouping generic-path-properties {
+    description "TE generic path properties grouping";
+    container path-properties {
+      config false;
+      description "The TE path properties";
+      list path-metric {
+        key metric-type;
+        uses path-metric;
+      }
+      list z-a-path-metric {
+        key metric-type;
+        uses path-metric;
+      }
+      list path-route-objects {
+          description
+            "Container for the list of route objects either returned by
+             the computation engine or actually used by an LSP";
+          container path-route-object {
+            description
+              "List of route objects either returned by the computation
+               engine or actually used by an LSP";
+            uses explicit-route-hop;
+          }
+        }
+    }
+  }
+
+  grouping path-info {
+    uses generic-path-properties;
+    description "Path computation output information";
+  }
+
+// adding some blocking reasons and info on path in case of blocking
+
+  grouping no-path-info {
+    description "no-path-info";
+    container no-path {
+      presence "Response without path information, due to failure
+        performing the path computation";
+      leaf no-path {
+        type string;
+        mandatory true ;
+        description
+          "returned blocking reasons:
+            NO_PATH
+            NO_COMPUTED_SNR
+            NO_FEASIBLE_BAUDRATE_WITH_SPACING
+            NO_PATH_WITH_CONSTRAINT
+            NO_FEASIBLE_MODE
+            MODE_NOT_FEASIBLE
+            NO_SPECTRUM
+          ";
+        }
+      uses generic-path-properties ;
+      description "if path computation cannot identify a path,
+        rpc returns no path.";
+    }
+  }
+
+   grouping service {
+     list path-request {
+       key "request-id";
+       description "request-list";
+       leaf request-id {
+         type string;
+         mandatory true;
+         description "Each path computation request is uniquely identified by the request-id-number.";
+       }
+       leaf bidirectional {
+         type boolean;
+         mandatory true;
+         description "Specify the bidirectionality of the path";
+       }
+
+       uses end-points;
+       uses path-route-objects;
+       uses generic-path-constraints;
+     }
+     uses synchronization-info;
+   }
+
+   grouping result {
+     list response {
+       key response-id;
+       config false;
+       description "response";
+       leaf response-id {
+         type string;
+         description
+         "The list key that has to reuse request-id-number.";
+       }
+       choice response-type {
+         config false;
+         description "response-type";
+         case no-path-case {
+           uses no-path-info;
+         }
+         case path-case {
+           uses path-info;
+           description "Path computation service.";
+         }
+       }
+     }
+   }
+}