module openconfig-transport-line-common {

  yang-version "1";

  // namespace
  namespace "http://openconfig.net/yang/transport-line-common";

  prefix "oc-line-com";

  // import some basic types
  import openconfig-platform {
    prefix oc-platform;
    revision-date "2016-06-06";
  }
  import openconfig-platform-types {
    prefix oc-platform-types;
    revision-date "2016-06-06";
  }
  import openconfig-interfaces {
    prefix oc-if;
    revision-date "2016-05-26";
  }
  import iana-if-type {
    prefix ift;
    revision-date "2016-11-23";
  }
  import openconfig-extensions {
    prefix oc-ext;
    revision-date "2015-10-09";
  }

    // import tailf-common {prefix "tailf";}
    // tailf:export netconf;
    // tailf:export rest;

  // meta
  organization "OpenConfig working group";

  contact
    "OpenConfig working group
    www.openconfig.net";

  description
    "This module defines common data elements for OpenConfig data
    models for optical transport line system elements, such as
    amplifiers and ROADMs (wavelength routers).";

  oc-ext:openconfig-version "0.1.0";

  revision "2016-03-31" {
    description
      "Initial public release";
    reference "0.1.0";
  }


  // extension statements

  // feature statements

  // identity statements

  identity OPTICAL_LINE_PORT_TYPE {
    description
      "Type definition for optical node port types";
  }

  identity INGRESS {
    base OPTICAL_LINE_PORT_TYPE;
    description
      "Ingress port, corresponding to a signal entering
      a line device such as an amplifier or wavelength
      router.";
  }

  identity EGRESS {
    base OPTICAL_LINE_PORT_TYPE;
    description
      "Egress port, corresponding to a signal exiting
      a line device wavelength router.";
  }

  identity ADD {
    base OPTICAL_LINE_PORT_TYPE;
    description
      "Add port, corresponding to a signal injected
      at a wavelength router.";
  }

  identity DROP {
    base OPTICAL_LINE_PORT_TYPE;
    description
      "Drop port, corresponding to a signal dropped
      at a wavelength router.";
  }

  // typedef statements

  // grouping statements

   grouping optical-osc-config {
    description
      "Configuration data for OSC interfaces";

    leaf-list interface {
      type oc-if:base-interface-ref;
      description
        "List of references to OSC interfaces";
    }
  }

  grouping optical-osc-state {
    description
      "Operational state data for OSC interfaces";
  }


  grouping optical-osc-top {
    description
      "Top-level grouping for configuration and operational state
      data for optical supervisory channels (OSC) for amplifiers,
      WSS/ROADM, nodes, etc.";

    container supervisory-channels {
      description
        "Top-level container for OSC data";

      container config {
        description
          "Configuration data for OSCs";

        uses optical-osc-config;
      }

      container state {

        config false;

        description
          "Operational state data for OSCs";

        uses optical-osc-config;
        uses optical-osc-state;
      }
    }
  }


  grouping transport-line-common-port-config {
    description
      "Configuration data for optical line ports";
  }

  grouping transport-line-common-port-state {
    description
      "Operational state data describing optical line ports";

    leaf optical-port-type {
      type identityref {
        base OPTICAL_LINE_PORT_TYPE;
      }
      description
        "Indicates the type of transport line port.  This is an
        informational field that should be made available by the
        device (e.g., in the openconfig-platform model).";
    }
  }

  grouping transport-line-common-port-top {
    description
      "Top-level grouping ";

    container optical-port {
      description
        "Top-level container ";

      container state {

        config false;

        description
          "Operational state data for optical line ports";

        uses transport-line-common-port-config;
        uses transport-line-common-port-state;
      }
    }
  }


  // data definition statements

  // uses optical-osc-top;

  // augment statements
/*
  augment "/oc-platform:components/oc-platform:component" {
    description
      "Adding optical line port data to platform model";

    uses transport-line-common-port-top {
      when "/oc-platform:components/oc-platform:component/" +
        "oc-platform:state/oc-platform:type = 'oc-platform-types:PORT'" {
        description
          "Augment is active when component is of type
          PORT";
      }
    }
  }
*/
  //TODO:this is placeholder until SONET model is added
  //to interfaces model
/*  augment "/oc-if:interfaces/oc-if:interface" {
    when "oc-if:type = 'ift:sonet'" {
      description "Additional interface configuration parameters when
      the interface type is SONET/SDH";
    }
    description "Adds additional SONET/SDH-specific data to
    osc model";

    container sonet {
      description
        "Data related to SONET/SDH interfaces";
    }
  }
*/
  // rpc statements

  // notification statements

}