Multiple ALTO Resources Query Using Multipart Message
draft-zhang-alto-multipart-00

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ALTO WG                                                          S. Chen
Internet-Draft                                                  J. Zhang
Intended status: Standards Track                       Tongji University
Expires: January 3, 2019                                   July 02, 2018

         Multiple ALTO Resources Query Using Multipart Message
                     draft-zhang-alto-multipart-00

Abstract

   Many ALTO use cases involve multiple ALTO information resources like
   network map, cost map and property map to achieve their own goal.  To
   make the ALTO client query them one by one is not only inefficient
   but also possible to introduce inconsistent issues.  Further more,
   some ALTO information resources may have correlation, which means
   one's input parameters may depends on another one's response.  So
   some advanced query schema is required.  This document proposes an
   extension to support the multiple ALTO resources query with HTTP
   multipart message and the existing JSON query languages.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on January 3, 2019.

Copyright Notice

   Copyright (c) 2018 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
   (https://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

Chen & Zhang             Expires January 3, 2019                [Page 1]
Internet-Draft                  Multipart                      July 2018

   to this document.  Code Components extracted from this document must
   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Background  . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminologies . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Simple Batch Query  . . . . . . . . . . . . . . . . . . .   4
     3.2.  Properties Constrained Query  . . . . . . . . . . . . . .   4
     3.3.  Path Vector Query . . . . . . . . . . . . . . . . . . . .   5
   4.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Overview of Approach  . . . . . . . . . . . . . . . . . . . .   6
   6.  Multipart Query Resource  . . . . . . . . . . . . . . . . . .   6
     6.1.  Media Type  . . . . . . . . . . . . . . . . . . . . . . .   6
     6.2.  HTTP Method . . . . . . . . . . . . . . . . . . . . . . .   6
     6.3.  Capabilities  . . . . . . . . . . . . . . . . . . . . . .   6
     6.4.  Accept Input Parameters . . . . . . . . . . . . . . . . .   6
     6.5.  Uses  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     6.6.  Response  . . . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Protocol Errors . . . . . . . . . . . . . . . . . . . . . . .   7
   8.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  IRD Example . . . . . . . . . . . . . . . . . . . . . . .   8
     8.2.  Example 1: Simple Batch Query . . . . . . . . . . . . . .  10
     8.3.  Example 2: Properties Constrained Query . . . . . . . . .  11
     8.4.  Example 3: Path Vector Query  . . . . . . . . . . . . . .  14
   9.  Compatibility . . . . . . . . . . . . . . . . . . . . . . . .  15
     9.1.  Compatibility with Legacy ALTO Clients/Servers  . . . . .  15
     9.2.  Compatibility with Existing Protocol Extensions . . . . .  16
     9.3.  Compatibility with New Communication Mechanism  . . . . .  16
   10. Misc Considerations . . . . . . . . . . . . . . . . . . . . .  16
     10.1.  Support Incremental Update . . . . . . . . . . . . . . .  16
     10.2.  Anonymous Resources  . . . . . . . . . . . . . . . . . .  16
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  16
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
     12.1.  application/alto-* Media Types . . . . . . . . . . . . .  16