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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...