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+module iana-hardware {
+  yang-version 1.1;
+  namespace "urn:ietf:params:xml:ns:yang:iana-hardware";
+  prefix ianahw;
+
+  organization "IANA";
+  contact
+    "        Internet Assigned Numbers Authority
+
+     Postal: ICANN
+             12025 Waterfront Drive, Suite 300
+             Los Angeles, CA  90094-2536
+             United States of America
+
+     Tel:    +1 310 301 5800
+     E-Mail: iana@iana.org>";
+
+  description
+    "IANA-defined identities for hardware class.
+
+     The latest revision of this YANG module can be obtained from
+     the IANA website.
+
+     Requests for new values should be made to IANA via
+     email (iana@iana.org).
+
+     Copyright (c) 2018 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).
+
+     The initial version of this YANG module is part of RFC 8348;
+     see the RFC itself for full legal notices.";
+  reference
+    "https://www.iana.org/assignments/yang-parameters";
+
+  revision 2018-03-13 {
+    description
+      "Initial revision.";
+    reference
+      "RFC 8348: A YANG Data Model for Hardware Management";
+  }
+
+  /*
+   * Identities
+   */
+
+  identity hardware-class {
+    description
+      "This identity is the base for all hardware class
+       identifiers.";
+  }
+
+  identity unknown {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is unknown
+       to the server.";
+  }
+
+  identity chassis {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is an
+       overall container for networking equipment.  Any class of
+       physical component, except a stack, may be contained within a
+       chassis; a chassis may only be contained within a stack.";
+  }
+
+  identity backplane {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of device for aggregating and forwarding networking traffic,
+       such as a shared backplane in a modular ethernet switch.  Note
+       that an implementation may model a backplane as a single
+       physical component, which is actually implemented as multiple
+       discrete physical components (within a chassis or stack).";
+  }
+
+  identity container {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is capable
+       of containing one or more removable physical entities,
+       possibly of different types.  For example, each (empty or
+       full) slot in a chassis will be modeled as a container.  Note
+       that all removable physical components should be modeled
+       within a container component, such as field-replaceable
+       modules, fans, or power supplies.  Note that all known
+       containers should be modeled by the agent, including empty
+       containers.";
+  }
+
+  identity power-supply {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is a
+       power-supplying component.";
+  }
+
+  identity fan {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is a fan or
+       other heat-reduction component.";
+  }
+
+  identity sensor {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of sensor, such as a temperature sensor within a router
+       chassis.";
+  }
+
+  identity module {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of self-contained sub-system.  If a module component is
+       removable, then it should be modeled within a container
+       component; otherwise, it should be modeled directly within
+       another physical component (e.g., a chassis or another
+       module).";
+  }
+
+  identity port {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of networking port capable of receiving and/or transmitting
+       networking traffic.";
+  }
+
+  identity stack {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of super-container (possibly virtual) intended to group
+       together multiple chassis entities.  A stack may be realized
+       by a virtual cable, a real interconnect cable attached to
+       multiple chassis, or multiple interconnect cables.  A stack
+       should not be modeled within any other physical components,
+       but a stack may be contained within another stack.  Only
+       chassis components should be contained within a stack.";
+  }
+
+  identity cpu {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of central processing unit.";
+  }
+
+  identity energy-object {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of energy object, i.e., it is a piece of equipment that is
+       part of or attached to a communications network that is
+       monitored, it is controlled, or it aids in the management of
+       another device for Energy Management.";
+  }
+
+  identity battery {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of battery.";
+  }
+
+  identity storage-drive {
+    base ianahw:hardware-class;
+    description
+      "This identity is applicable if the hardware class is some sort
+       of component with data storage capability as its main
+       functionality, e.g., hard disk drive (HDD), solid-state device
+       (SSD), solid-state hybrid drive (SSHD), object storage device
+       (OSD), or other.";
+  }
+}
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