diff --git a/models/openconfig/src/main/yang/platform/openconfig-platform-transceiver.yang b/models/openconfig/src/main/yang/platform/openconfig-platform-transceiver.yang
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+module openconfig-platform-transceiver {
+
+  yang-version "1";
+
+  // namespace
+  namespace "http://openconfig.net/yang/platform/transceiver";
+
+  prefix "oc-transceiver";
+
+  // import some basic types
+  import openconfig-platform { prefix oc-platform; }
+  import openconfig-interfaces { prefix oc-if; }
+  import openconfig-transport-types { prefix oc-opt-types; }
+  import openconfig-types { prefix oc-types; }
+  import openconfig-extensions { prefix oc-ext; }
+  import ietf-yang-types { prefix yang; }
+
+
+  // meta
+  organization "OpenConfig working group";
+
+  contact
+    "OpenConfig working group
+    www.openconfig.net";
+
+  description
+    "This module defines configuration and operational state data
+    for transceivers (i.e., pluggable optics).  The module should be
+    used in conjunction with the platform model where other
+    physical entity data are represented.
+
+    In the platform model, a component of type=TRANSCEIVER is
+    expected to be a subcomponent of a PORT component.  This
+    module defines a concrete schema for the associated data for
+    components with type=TRANSCEIVER.";
+
+  oc-ext:openconfig-version "0.3.0";
+
+  revision "2017-07-08" {
+    description
+      "Adds clarification on aggregate power measurement data";
+    reference "0.3.0";
+  }
+
+  revision "2016-12-22" {
+    description
+      "Adds preconfiguration data and clarified units";
+    reference "0.2.0";
+  }
+
+  // identity statements
+
+  // typedef statements
+
+  // grouping statements
+
+  grouping optical-power-state {
+    description
+      "Reusable leaves related to optical power state -- these
+      are read-only state values. If avg/min/max statistics are
+      not supported, the target is expected to just supply the
+      instant value";
+
+    container output-power {
+      description
+        "The output optical power of a physical channel in units
+        of 0.01dBm, which may be associated with individual
+        physical channels, or an aggregate of multiple physical
+        channels (i.e., for the overall transceiver). For an
+        aggregate, this may be a measurement from a photodetector
+        or a a calculation performed on the device by summing up
+        all of the related individual physical channels.
+        Values include the instantaneous, average, minimum, and
+        maximum statistics. If avg/min/max statistics are not
+        supported, the target is expected to just supply the
+        instant value";
+
+      uses oc-types:avg-min-max-instant-stats-precision2-dBm;
+    }
+
+    container input-power {
+      description
+        "The input optical power of a physical channel in units
+        of 0.01dBm, which may be associated with individual
+        physical channels, or an aggregate of multiple physical
+        channels (i.e., for the overall transceiver). For an
+        aggregate, this may be a measurement from a photodetector
+        or a a calculation performed on the device by summing up
+        all of the related individual physical channels.
+        Values include the instantaneous, average, minimum, and
+        maximum statistics. If avg/min/max statistics are not
+        supported, the target is expected to just supply the
+        instant value";
+
+      uses oc-types:avg-min-max-instant-stats-precision2-dBm;
+    }
+
+    container laser-bias-current {
+      description
+        "The current applied by the system to the transmit laser to
+        achieve the output power. The current is expressed in mA
+        with up to two decimal precision. Values include the
+        instantaneous, average, minimum, and maximum statistics.
+        If avg/min/max statistics are not supported, the target is
+        expected to just supply the instant value";
+
+      uses oc-types:avg-min-max-instant-stats-precision2-mA;
+    }
+  }
+
+  grouping output-optical-frequency {
+    description
+      "Reusable leaves related to optical output power -- this is
+      typically configurable on line side and read-only on the
+      client-side";
+
+    leaf output-frequency {
+      type oc-opt-types:frequency-type;
+      description
+        "The frequency in MHz of the individual physical channel
+        (e.g. ITU C50 - 195.0THz and would be reported as
+        195,000,000 MHz in this model). This attribute is not
+        configurable on most client ports.";
+    }
+  }
+
+
+  grouping physical-channel-config {
+    description
+      "Configuration data for physical client channels";
+
+    leaf index {
+      type uint16 {
+        range 0..max;
+      }
+      description
+        "Index of the physical channnel or lane within a physical
+        client port";
+    }
+
+    leaf description {
+      type string;
+      description
+        "Text description for the client physical channel";
+    }
+
+    leaf tx-laser {
+      type boolean;
+      description
+        "Enable (true) or disable (false) the transmit label for the
+        channel";
+    }
+
+    leaf target-output-power {
+      type decimal64 {
+        fraction-digits 2;
+      }
+      units dBm;
+      description
+        "Target output optical power level of the optical channel,
+        expressed in increments of 0.01 dBm (decibel-milliwats)";
+    }
+  }
+
+  grouping physical-channel-state {
+    description
+      "Operational state data for client channels.";
+
+    uses output-optical-frequency;
+    uses optical-power-state;
+  }
+
+  grouping physical-channel-top {
+    description
+      "Top-level grouping for physical client channels";
+
+    container physical-channels {
+      description
+        "Enclosing container for client channels";
+
+      list channel {
+        key "index";
+        description
+          "List of client channels, keyed by index within a physical
+          client port.  A physical port with a single channel would
+          have a single zero-indexed element";
+
+        leaf index {
+          type leafref {
+            path "../config/index";
+          }
+          description
+            "Reference to the index number of the channel";
+        }
+
+        container config {
+          description
+            "Configuration data for physical channels";
+
+          uses physical-channel-config;
+        }
+
+        container state {
+
+          config false;
+
+          description
+            "Operational state data for channels";
+
+          uses physical-channel-config;
+          uses physical-channel-state;
+        }
+      }
+    }
+  }
+
+
+  grouping port-transceiver-config {
+    description
+      "Configuration data for client port transceivers";
+
+    leaf enabled {
+      type boolean;
+      description
+        "Turns power on / off to the transceiver -- provides a means
+        to power on/off the transceiver (in the case of SFP, SFP+,
+        QSFP,...) or enable high-power mode (in the case of CFP,
+        CFP2, CFP4) and is optionally supported (device can choose to
+        always enable).  True = power on / high power, False =
+        powered off";
+    }
+
+    leaf form-factor-preconf {
+      type identityref {
+        base oc-opt-types:TRANSCEIVER_FORM_FACTOR_TYPE;
+      }
+      description
+        "Indicates the type of optical transceiver used on this
+        port.  If the client port is built into the device and not
+        pluggable, then non-pluggable is the corresponding state. If
+        a device port supports multiple form factors (e.g. QSFP28
+        and QSFP+, then the value of the transceiver installed shall
+        be reported. If no transceiver is present, then the value of
+        the highest rate form factor shall be reported
+        (QSFP28, for example).
+
+        The form factor is included in configuration data to allow
+        pre-configuring a device with the expected type of
+        transceiver ahead of deployment.  The corresponding state
+        leaf should reflect the actual transceiver type plugged into
+        the system.";
+    }
+
+    leaf ethernet-pmd-preconf {
+      type identityref {
+        base oc-opt-types:ETHERNET_PMD_TYPE;
+      }
+      description
+        "The Ethernet PMD is a property of the optical transceiver
+        used on the port, indicating the type of physical connection.
+        It is included in configuration data to allow pre-configuring
+        a port/transceiver with the expected PMD.  The actual PMD is
+        indicated by the ethernet-pmd state leaf.";
+    }
+  }
+
+  grouping port-transceiver-state {
+    description
+      "Operational state data for client port transceivers";
+
+    leaf present {
+      type enumeration {
+        enum PRESENT {
+          description
+            "Transceiver is present on the port";
+        }
+        enum NOT_PRESENT {
+          description
+            "Transceiver is not present on the port";
+        }
+      }
+      description
+        "Indicates whether a transceiver is present in
+        the specified client port.";
+    }
+
+    leaf form-factor {
+      type identityref {
+        base oc-opt-types:TRANSCEIVER_FORM_FACTOR_TYPE;
+      }
+      description
+        "Indicates the type of optical transceiver used on this
+        port.  If the client port is built into the device and not
+        pluggable, then non-pluggable is the corresponding state. If
+        a device port supports multiple form factors (e.g. QSFP28
+        and QSFP+, then the value of the transceiver installed shall
+        be reported. If no transceiver is present, then the value of
+        the highest rate form factor shall be reported
+        (QSFP28, for example).";
+    }
+
+    leaf connector-type {
+      type identityref {
+        base oc-opt-types:FIBER_CONNECTOR_TYPE;
+      }
+      description
+        "Connector type used on this port";
+    }
+
+    leaf internal-temp {
+    // TODO: this should probably be removed if we add temperature
+    // as a top-level component property, i.e., transceiver temp
+    // should be reported there.
+      type int16 {
+        range -40..125;
+      }
+      description
+        "Internally measured temperature in degrees Celsius. MSA
+        valid range is between -40 and +125C. Accuracy shall be
+        better than +/- 3 degC over the whole temperature range.";
+    }
+
+    leaf vendor {
+      type string {
+        length 1..16;
+      }
+      description
+        "Full name of transceiver vendor. 16-octet field that
+        contains ASCII characters, left-aligned and padded on the
+        right with ASCII spaces (20h)";
+    }
+
+    leaf vendor-part {
+      type string {
+        length 1..16;
+      }
+      description
+        "Transceiver vendor's part number. 16-octet field that
+        contains ASCII characters, left-aligned and padded on the
+        right with ASCII spaces (20h). If part number is undefined,
+        all 16 octets = 0h";
+    }
+
+    leaf vendor-rev {
+      type string {
+        length 1..2;
+      }
+      description
+        "Transceiver vendor's revision number. 2-octet field that
+        contains ASCII characters, left-aligned and padded on the
+        right with ASCII spaces (20h)";
+    }
+
+    //TODO: these compliance code leaves should be active based on
+    //the type of port
+    leaf ethernet-pmd {
+      type identityref {
+        base oc-opt-types:ETHERNET_PMD_TYPE;
+      }
+      description
+        "Ethernet PMD (physical medium dependent sublayer) that the
+        transceiver supports. The SFF/QSFP MSAs have registers for
+        this and CFP MSA has similar.";
+    }
+
+    leaf sonet-sdh-compliance-code {
+      type identityref {
+        base oc-opt-types:SONET_APPLICATION_CODE;
+      }
+      description
+        "SONET/SDH application code supported by the port";
+    }
+
+    leaf otn-compliance-code {
+      type identityref {
+        base oc-opt-types:OTN_APPLICATION_CODE;
+      }
+      description
+        "OTN application code supported by the port";
+    }
+
+    leaf serial-no {
+      type string {
+        length 1..16;
+      }
+      description
+        "Transceiver serial number. 16-octet field that contains
+        ASCII characters, left-aligned and padded on the right with
+        ASCII spaces (20h). If part serial number is undefined, all
+        16 octets = 0h";
+    }
+
+    leaf date-code {
+      type yang:date-and-time;
+      description
+        "Representation of the transceiver date code, typically
+        stored as YYMMDD.  The time portion of the value is
+        undefined and not intended to be read.";
+    }
+
+    leaf fault-condition {
+      type boolean;
+      description
+        "Indicates if a fault condition exists in the transceiver";
+    }
+
+    uses optical-power-state;
+
+  }
+
+  grouping port-transceiver-top {
+    description
+      "Top-level grouping for client port transceiver data";
+
+    container transceiver {
+      description
+        "Top-level container for client port transceiver data";
+
+      container config {
+        description
+          "Configuration data for client port transceivers";
+
+        uses port-transceiver-config;
+      }
+
+      container state {
+
+        config false;
+
+        description
+          "Operational state data for client port transceivers";
+
+        uses port-transceiver-config;
+        uses port-transceiver-state;
+      }
+      // physical channels are associated with a transceiver
+      // component
+      uses physical-channel-top;
+    }
+  }
+
+  // data definition statements
+
+  // augment statements
+
+  augment "/oc-platform:components/oc-platform:component" {
+    description
+      "Adding transceiver data to physical inventory";
+
+    uses port-transceiver-top {
+      when "current()/oc-platform:state/" +
+        "oc-platform:type = 'TRANSCEIVER'" {
+        description
+          "Augment is active when component is of type TRANSCEIVER";
+      }
+    }
+  }
+
+  augment "/oc-if:interfaces/oc-if:interface/oc-if:state" {
+    //TODO: add 'when' or other condition to make sure this
+    //leafref points to a component of type TRANSCEIVER.
+    description
+      "Adds a reference from the base interface to its corresponding
+      physical channels.";
+
+    leaf-list physical-channel {
+      type leafref {
+        path "/oc-platform:components/" +
+          "oc-platform:component[oc-platform:name=current()/../oc-platform:hardware-port]/" +
+          "oc-transceiver:transceiver/" +
+          "oc-transceiver:physical-channels/oc-transceiver:channel/" +
+          "oc-transceiver:index";
+      }
+      description
+        "For a channelized interface, list of references to the
+        physical channels (lanes) corresponding to the interface.";
+    }
+  }
+
+  // rpc statements
+
+  // notification statements
+
+}