module ietf-sr-topology-state {

    yang-version 1.1;

    namespace
      "urn:ietf:params:xml:ns:yang:ietf-sr-topology-state";

    prefix srt-s;

    import ietf-sr-topology {
      prefix srt;
    }
    import ietf-network-state {
      prefix nw-s;
    }
    import ietf-network-topology-state {
      prefix nt-s;
    }
    import ietf-l3-unicast-topology-state {
      prefix l3t-s;
    }
    import ietf-segment-routing-common {
      prefix sr-cmn;
    }

    organization "TBD";

    contact "TBD";

    description "L3 TE Topology model";

    revision "2017-10-30" {
      description "Initial revision";
      reference
        "TBD";

    }


    augment /nw-s:networks/nw-s:network/nw-s:network-types/l3t-s:l3-unicast-topology {
      description
        "Defines the SR topology type.";
      uses srt:sr-topology-type;
    }

    augment /nw-s:networks/nw-s:network/l3t-s:l3-topology-attributes {
      when
        "../nw-s:network-types/l3t-s:l3-unicast-topology/sr" {
        description
          "Augment only for SR topology.";
      }
      description
        "Augment topology configuration";
      uses srt:sr-topology-attributes;
    }

    augment /nw-s:networks/nw-s:network/nw-s:node/l3t-s:l3-node-attributes {
      when
        "../../nw-s:network-types/l3t-s:l3-unicast-topology/sr" {
        description
          "Augment only for SR topology.";
      }
      description
        "Augment node configuration.";
      uses srt:sr-node-attributes;
    }

    augment /nw-s:networks/nw-s:network/nw-s:node/l3t-s:l3-node-attributes/l3t-s:prefix {
      when
        "../../../nw-s:network-types/l3t-s:l3-unicast-topology/sr" {
        description
          "Augment only for SR topology.";
      }
      description "Augment node prefix.";
      uses srt:sr-node-prefix-attributes;
    }

    augment /nw-s:networks/nw-s:network/nw-s:node/nt-s:termination-point/l3t-s:l3-termination-point-attributes {
      when
        "../../../nw-s:network-types/l3t-s:l3-unicast-topology/"
          + "sr" {
        description
          "Augment only for SR topology.";
      }
      description
        "Augment termination point configuration";
      uses srt:sr-tp-attributes;
    }

    augment /nw-s:networks/nw-s:network/nt-s:link/l3t-s:l3-link-attributes {
      when
        "../../nw-s:network-types/l3t-s:l3-unicast-topology/sr" {
        description
          "Augment only for SR topology.";
      }
      description
        "Augment link configuration.";
      uses srt:sr-link-attributes;
    }

    grouping sr-topology-attributes {
      description
        "SR topology scope attributes.";
      container sr {
        description
          "Containing SR attributes.";
        uses sr-cmn:srgb-cfg;
      }  // container sr
    }  // grouping sr-topology-attributes
  }  // module ietf-sr-topology-state