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Select and Sort Extensions for the Service Location Protocol (SLP) (RFC3421)

IP.com Disclosure Number: IPCOM000010396D
Original Publication Date: 2002-Nov-01
Included in the Prior Art Database: 2002-Nov-26
Document File: 9 page(s) / 15K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

W. Zhao: AUTHOR [+5]

Abstract

This document defines two extensions (Select and Sort) for the Service Location Protocol (SLP). These extensions allow a User Agent (UA) to request that the Uniform Resource Locator (URL) entries in a Service Reply (SrvRply) be limited to the specified number, or be sorted according to the specified sort key list. Using these two extensions together can facilitate discovering the best match, such as finding a service that has the maximum speed or the minimum load.

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Network Working Group                                            W. Zhao

Request for Comments: 3421                                H. Schulzrinne

Category: Experimental                               Columbia University

                                                              E. Guttman

                                                        Sun Microsystems

                                                            C. Bisdikian

                                                               W. Jerome

                                                                     IBM

                                                           November 2002

   Select and Sort Extensions for the Service Location Protocol (SLP)

Status of this Memo

   This memo defines an Experimental Protocol for the Internet

   community.  It does not specify an Internet standard of any kind.

   Discussion and suggestions for improvement are requested.

   Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This document defines two extensions (Select and Sort) for the

   Service Location Protocol (SLP).  These extensions allow a User Agent

   (UA) to request that the Uniform Resource Locator (URL) entries in a

   Service Reply (SrvRply) be limited to the specified number, or be

   sorted according to the specified sort key list.  Using these two

   extensions together can facilitate discovering the best match, such

   as finding a service that has the maximum speed or the minimum load.

1. Introduction

   This document defines two extensions (Select and Sort) for SLP

   [RFC2608].  These extensions allow a UA to request that the URL

   entries in a SrvRply be limited to the specified number, or be sorted

   according to the specified sort key list.  A Directory Agent (DA) or

   Service Agent (SA) that supports the Select and/or Sort extensions

   MUST include the attribute keyword "select-enabled" and/or "sort-

   enabled" in its advertisement (DAAdvert or SAAdvert).  A UA SHOULD

   check these attributes of the contacting DA/SA before it uses the

   Select and/or Sort extensions to query the DA/SA.

Zhao, et. al.                 Experimental                      [Page 1]

RFC 3421           Select and Sort Extensions for SLP      November 2002

   Using the Select extension, a UA can opt for finding just a few (not

   necessarily all) matching services, which is useful...