Registration Data Access Protocol (RDAP) Query Parameters for Result Sorting and Paging
draft-loffredo-regext-rdap-sorting-and-paging-05

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Registration Protocols Extensions                            M. Loffredo
Internet-Draft                                             M. Martinelli
Intended status: Standards Track                     IIT-CNR/Registro.it
Expires: March 25, 2019                                    S. Hollenbeck
                                                           Verisign Labs
                                                      September 21, 2018

  Registration Data Access Protocol (RDAP) Query Parameters for Result
                           Sorting and Paging
            draft-loffredo-regext-rdap-sorting-and-paging-05

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.

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   This Internet-Draft will expire on March 25, 2019.

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   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

Loffredo, et al.         Expires March 25, 2019                 [Page 1]
Internet-Draft           RDAP Sorting and Paging          September 2018

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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 Paging Links . . . . . . . . . . . . . .  13
   3.  Negative Answers  . . . . . . . . . . . . . . . . . . . . . .  14
   4.  RDAP Conformance  . . . . . . . . . . . . . . . . . . . . . .  15
   5.  Implementation Considerations . . . . . . . . . . . . . . . .  15
     5.1.  Considerations about Paging Implementation  . . . . . . .  16
   6.  Implementation Status . . . . . . . . . . . . . . . . . . . .  19
     6.1.  IIT-CNR/Registro.it . . . . . . . . . . . . . . . . . . .  19
     6.2.  Google Registry . . . . . . . . . . . . . . . . . . . . .  19
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  20
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  20
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  21
     10.2.  Informative References . . . . . . . . . . . . . . . . .  22
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  24
   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;
   o  decreasing server query processing load;
   o  reducing client response processing time.
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