Metadata Query Protocol
draft-young-md-query-06

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Network Working Group                                      I. Young, Ed.
Internet-Draft                                               Independent
Intended status: Informational                          January 13, 2017
Expires: July 17, 2017

                        Metadata Query Protocol
                        draft-young-md-query-06

Abstract

   This document defines a simple protocol for retrieving metadata about
   named entities, or named collections of entities.  The goal of the
   protocol is to profile various aspects of HTTP to allow requesters to
   rely on certain, rigorously defined, behaviour.

   This document is a product of the Research and Education Federations
   (REFEDS) Working Group process.

Editorial Note (To be removed by RFC Editor before publication)

   Discussion of this draft takes place on the MDX mailing list
   (mdx@lists.iay.org.uk), which is accessed from [MDX.list].

   XML versions, latest edits and the issues list for this document are
   available from [md-query].

   The changes in this draft are summarized in Appendix A.7.

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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   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on July 17, 2017.

Young                     Expires July 17, 2017                 [Page 1]
Internet-Draft           Metadata Query Protocol            January 2017

Copyright Notice

   Copyright (c) 2017 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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Notation and Conventions  . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Protocol Transport  . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Transport Protocol  . . . . . . . . . . . . . . . . . . .   4
     2.2.  HTTP Version  . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  HTTP Method . . . . . . . . . . . . . . . . . . . . . . .   4
     2.4.  Request Headers . . . . . . . . . . . . . . . . . . . . .   4
     2.5.  Response Headers  . . . . . . . . . . . . . . . . . . . .   5
     2.6.  Status Codes  . . . . . . . . . . . . . . . . . . . . . .   5
     2.7.  Base URL  . . . . . . . . . . . . . . . . . . . . . . . .   6
     2.8.  Content Negotiation . . . . . . . . . . . . . . . . . . .   6
   3.  Metadata Query Protocol . . . . . . . . . . . . . . . . . . .   6
     3.1.  Identifiers . . . . . . . . . . . . . . . . . . . . . . .   7
     3.2.  Protocol  . . . . . . . . . . . . . . . . . . . . . . . .   7
       3.2.1.  Request by Identifier . . . . . . . . . . . . . . . .   7
       3.2.2.  Request All Entities  . . . . . . . . . . . . . . . .   8
       3.2.3.  Response  . . . . . . . . . . . . . . . . . . . . . .   8
       3.2.4.  Example Request and Response  . . . . . . . . . . . .   8
   4.  Efficient Retrieval and Caching . . . . . . . . . . . . . . .   9
     4.1.  Conditional Retrieval . . . . . . . . . . . . . . . . . .   9
     4.2.  Content Caching . . . . . . . . . . . . . . . . . . . . .   9
     4.3.  Content Compression . . . . . . . . . . . . . . . . . . .   9
   5.  Protocol Extension Points . . . . . . . . . . . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
     6.1.  Integrity . . . . . . . . . . . . . . . . . . . . . . . .  10
     6.2.  Confidentiality . . . . . . . . . . . . . . . . . . . . .  10
     6.3.  Authentication  . . . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  12
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