Registration Data Access Protocol (RDAP) Query Parameters for Result Sorting and Paging
draft-ietf-regext-rdap-sorting-and-paging-01

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Registration Protocols Extensions                            M. Loffredo
Internet-Draft                                             M. Martinelli
Intended status: Standards Track                     IIT-CNR/Registro.it
Expires: October 13, 2019                                  S. Hollenbeck
                                                           Verisign Labs
                                                          April 11, 2019

  Registration Data Access Protocol (RDAP) Query Parameters for Result
                           Sorting and Paging
              draft-ietf-regext-rdap-sorting-and-paging-01

Abstract

   The Registration Data Access Protocol (RDAP) does not include core
   functionality for clients to provide sorting and paging parameters
   for control of large result sets.  This omission can lead to
   unpredictable server processing of queries and client processing of
   responses.  This unpredictability can be greatly reduced if clients
   can provide servers with their preferences for managing response
   values.  This document describes RDAP query extensions that allow
   clients to specify their preferences for sorting and paging result
   sets.

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
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   This Internet-Draft will expire on October 13, 2019.

Copyright Notice

   Copyright (c) 2019 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

Loffredo, et al.        Expires October 13, 2019                [Page 1]
Internet-Draft           RDAP Sorting and Paging              April 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions Used in This Document . . . . . . . . . . . .   4
   2.  RDAP Query Parameter Specification  . . . . . . . . . . . . .   4
     2.1.  Sorting and Paging Metadata . . . . . . . . . . . . . . .   4
     2.2.  "count" Parameter . . . . . . . . . . . . . . . . . . . .   6
     2.3.  "sort" Parameter  . . . . . . . . . . . . . . . . . . . .   7
       2.3.1.  Representing Sorting Links  . . . . . . . . . . . . .  11
     2.4.  "limit" and "offset" Parameters . . . . . . . . . . . . .  12
       2.4.1.  Representing Offset Pagination Links  . . . . . . . .  13
     2.5.  "cursor" Parameter  . . . . . . . . . . . . . . . . . . .  14
       2.5.1.  Representing Cursor Pagination Links  . . . . . . . .  16
   3.  Negative Answers  . . . . . . . . . . . . . . . . . . . . . .  17
   4.  RDAP Conformance  . . . . . . . . . . . . . . . . . . . . . .  18
   5.  Implementation Considerations . . . . . . . . . . . . . . . .  18
   6.  Implementation Status . . . . . . . . . . . . . . . . . . . .  19
     6.1.  IIT-CNR/Registro.it . . . . . . . . . . . . . . . . . . .  20
     6.2.  Google Registry . . . . . . . . . . . . . . . . . . . . .  20
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  20
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  21
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  21
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  21
     10.2.  Informative References . . . . . . . . . . . . . . . . .  22
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  25
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  25

1.  Introduction

   The availability of functionality for result sorting and paging
   provides benefits to both clients and servers in the implementation
   of RESTful services [REST].  These benefits include:

   o  reducing the server response bandwidth requirements;
   o  improving server response time;
   o  improving query precision and, consequently, obtaining more
      reliable results;