YANG Module Library
draft-ietf-netconf-yang-library-02

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Last updated 2015-10-18
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Network Working Group                                         A. Bierman
Internet-Draft                                                 YumaWorks
Intended status: Standards Track                            M. Bjorklund
Expires: April 20, 2016                                   Tail-f Systems
                                                               K. Watsen
                                                        Juniper Networks
                                                        October 18, 2015

                          YANG Module Library
                   draft-ietf-netconf-yang-library-02

Abstract

   This document describes a YANG library, which provides information
   about all the YANG modules used by a device to represent management
   and protocol information.  A YANG library can be shared by multiple
   protocols within the same device.  Simple caching mechanisms are
   needed to allow clients to minimize retrieval of this information.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 20, 2016.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   to this document.  Code Components extracted from this document must

Bierman, et al.          Expires April 20, 2016                 [Page 1]
Internet-Draft                YANG Library                  October 2015

   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
       1.1.1.  NETCONF . . . . . . . . . . . . . . . . . . . . . . .   3
       1.1.2.  YANG  . . . . . . . . . . . . . . . . . . . . . . . .   3
       1.1.3.  Terms . . . . . . . . . . . . . . . . . . . . . . . .   3
       1.1.4.  Tree Diagrams . . . . . . . . . . . . . . . . . . . .   4
   2.  YANG Module Library . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  modules . . . . . . . . . . . . . . . . . . . . . . . . .   4
       2.1.1.  modules/module-set-id . . . . . . . . . . . . . . . .   5
       2.1.2.  modules/module  . . . . . . . . . . . . . . . . . . .   5
     2.2.  YANG Library Module . . . . . . . . . . . . . . . . . . .   5
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
     3.1.  YANG Module Registry  . . . . . . . . . . . . . . . . . .  10
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .  11
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  12
     A.1.  01 to 02  . . . . . . . . . . . . . . . . . . . . . . . .  12
     A.2.  00 to 01  . . . . . . . . . . . . . . . . . . . . . . . .  12
     A.3.  draft-ietf-netconf-restconf-03 to 00  . . . . . . . . . .  12
   Appendix B.  Open Issues  . . . . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   There is a need for standard mechanisms to identify the YANG modules
   and submodules that are in use by a server that utilizes YANG-based
   data abstractions.  If a large number of YANG modules are utilized by
   the server, then the YANG library information needed can be
   relatively large.  This information changes very infrequently, so it
   is important that clients be able to cache the YANG library and
   easily identify if their cache is out-of-date.

   YANG library information can be different on every server, and can
   change at run-time or across a server reboot.  Typically, a firmware
   upgrade is required to change the set of YANG modules used by a
   server.

   The following information is needed by a client application (for each
   YANG module in the library) to fully utilize the YANG data modeling
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