YANG Module Library
draft-ietf-netconf-yang-library-04

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Document Type Active Internet-Draft (netconf WG)
Last updated 2016-04-01 (latest revision 2016-02-02)
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Network Working Group                                         A. Bierman
Internet-Draft                                                 YumaWorks
Intended status: Standards Track                            M. Bjorklund
Expires: August 6, 2016                                   Tail-f Systems
                                                               K. Watsen
                                                        Juniper Networks
                                                        February 3, 2016

                          YANG Module Library
                   draft-ietf-netconf-yang-library-04

Abstract

   This document describes a YANG library, which provides information
   about all the YANG modules used by a network management server (e.g.,
   a Network Configuration Protocol (NETCONF) server).  Simple caching
   mechanisms are provided 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.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 6, 2016.

Copyright Notice

   Copyright (c) 2016 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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must

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   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
     1.2.  Tree Diagrams . . . . . . . . . . . . . . . . . . . . . .   4
   2.  YANG Module Library . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  modules-state . . . . . . . . . . . . . . . . . . . . . .   5
       2.1.1.  modules-state/module-set-id . . . . . . . . . . . . .   5
       2.1.2.  modules-state/module  . . . . . . . . . . . . . . . .   5
     2.2.  YANG Library Module . . . . . . . . . . . . . . . . . . .   5
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
     3.1.  YANG Module Registry  . . . . . . . . . . . . . . . . . .  11
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  13
     A.1.  v03 to v04  . . . . . . . . . . . . . . . . . . . . . . .  13
     A.2.  v02 to v03  . . . . . . . . . . . . . . . . . . . . . . .  14
     A.3.  v01 to v02  . . . . . . . . . . . . . . . . . . . . . . .  14
     A.4.  v00 to v01  . . . . . . . . . . . . . . . . . . . . . . .  14
     A.5.  draft-ietf-netconf-restconf-03 to v00 . . . . . . . . . .  14
   Appendix B.  Open Issues  . . . . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   There is a need for standard mechanisms to identify the YANG modules
   and submodules that are in use by a server that implements YANG data
   models.  If a large number of YANG modules are utilized by the
   server, then the YANG library contents needed can be relatively
   large.  This information changes very infrequently, so it is
   important that clients be able to cache the YANG library contents and
   easily identify whether 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.

   If the server implements multiple protocols to access the YANG-
   defined data, each such protocol has it's own conceptual
   instantiation of the YANG library.

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