java开发技术--XMPP核心.PDF

本文档定义了可扩展消息存在协议（MPP 的核心特性：该协议使用 M 元素在任意两个网络端点之间近乎实时地交换结构化信息。虽然 MPP 提供了一个通用的、可扩展的框架来交换 MM 数据，但它是主要用于构建满足 RFC2779 要求的即时消息和在线应用程序。
1 简介
1.1 概述
MPP 是一种开放的可扩展标记语言 [MM 协议，用于近乎实时的消息传递、存在和请求-响应服务。基本语法语义最初由 Jabber 开源社区于 1999 年开发。2002 年，MPPI 工作组授权开发适用于 IET 即时消息（IM and Presence Technology）的 Jabbe 协议的重写。
作为 MPPI 工作组的成果，本文档定义了 XPP1.Q 的核心内容； RFC2779 [IM-REQS] 中定义了提供即时消息和在线功能的扩展要求，由 MPP.Instant Messaging and Presence [MPP-IM] 指定。
1.2 术语
文档中的大写关键字：“MUST”、“MUST NDT”、“REQUJIRED”、“SHALL”、“SHALL NOT”、“SHOJLD”、“SHOJLD NOT”、“RECOMMENDED” ;、“TMAY”、“可选”在 BCP14 中，在 RFC 2119 [条款] 中描述。
2 总体架构 2.1 概述
尽管 MP 与任何特定的网络体系结构无关，但到目前为止，它主要由客户端-服务器体系结构实现。其中，客户端使用MP来阻止基于TCP连接的服务器，服务器之间也通过TC连接进行通信。

(This document defines the core feature of the extensible message presence protocol (MPP): the protocol uses the M element to exchange structured information between any two network endpoints in near real time. Although MPP provides a general and extensible framework to exchange mm data, it is mainly used to build instant messaging and online applications that meet the requirements of rfc2779.
1 Introduction
1.1 general
MPP is an open extensible markup language [mm protocol, which is used for near real-time messaging, presence and request response services. The basic syntax semantics were originally developed by jabber open source community in 1999. In 2002, MPPI working group authorized the development of a rewrite of jabbe protocol for IET instant messaging (IM and presence technology).
As a result of the MPPI working group, this document defines xpp1 The core content of Q; Rfc2779 [im-reqs] defines the extension requirements for providing instant messaging and online functions, and mpp Instant messaging and presence [mpp-im] specify.
1.2 terminology
Capitalized keywords in the document: "must", "must NDT", "required", "shall", "shall not", "showjld", "showjld not", "recommended" "Tmay" and "optional" are described in bcp14 and RFC 2119 [terms].
2 overall architecture 2.1 overview
Although MP has nothing to do with any particular network architecture, so far, it is mainly implemented by client server architecture. Among them, the client uses MP to block servers based on TCP connections, and servers also communicate through TC connections.)

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