<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Conventions Used in This Book</title><link rel="stylesheet" href="styles.css" type="text/css" /><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /><link rel="start" href="index.html" title="Asterisk™: The Future of Telephony" /><link rel="up" href="asterisk-PREFACE.html" title="Preface" /><link rel="prev" href="asterisk-PREFACE-SECT-3.html" title="Software" /><link rel="next" href="asterisk-PREFACE-SECT-5.html" title="Using Code Examples" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Conventions Used in This Book</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="asterisk-PREFACE-SECT-3.html">Prev</a> </td><th width="60%" align="center">Preface</th><td width="20%" align="right"> <a accesskey="n" href="asterisk-PREFACE-SECT-5.html">Next</a></td></tr></table><hr /></div><div class="sect1" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="asterisk-PREFACE-SECT-4"></a>Conventions Used in This Book</h2></div></div></div><p>The following typographical conventions are used in this book:</p><div class="variablelist"><dl><dt><span class="term"> <span class="emphasis"><em>Italic</em></span> </span></dt><dd><p>Indicates new terms, URLs, email addresses, filenames, file extensions, pathnames, directories, and Unix utilities.</p></dd><dt><span class="term"> <code class="literal">Constant width</code> </span></dt><dd><p>Indicates commands, options, parameters, and arguments that must be substituted into commands.</p></dd><dt><span class="term"> <strong class="userinput"><code>Constant width bold</code></strong> </span></dt><dd><p>Shows commands or other text that should be typed literally by the user. Also used for emphasis in code.</p></dd><dt><span class="term"> <em class="replaceable"><code>Constant width italic</code></em> </span></dt><dd><p>Shows text that should be replaced with user-supplied values.</p></dd><dt><span class="term"> <code class="literal">[ Keywords and other stuff ]</code> </span></dt><dd><p>Indicates optional keywords and arguments.</p></dd><dt><span class="term"> <code class="literal">{ choice-1 | choice-2 }</code> </span></dt><dd><p>Signifies either <span class="emphasis"><em>choice-1</em></span> or <span class="emphasis"><em>choice-2</em></span>.</p></dd></dl></div><div class="tip" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title"><a id="asterisk-PREFACE-NOTE-1"></a>Tip</h3><p>This icon signifies a tip, suggestion, or general note.</p></div><div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title"><a id="asterisk-PREFACE-NOTE-2"></a>Warning</h3><p>This icon indicates a warning or caution.</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="asterisk-PREFACE-SECT-3.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="asterisk-PREFACE.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="asterisk-PREFACE-SECT-5.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Software </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Using Code Examples</td></tr></table></div><div xmlns="" id="svn-footer"><hr /><p>You are reading <em>Asterisk: The Future of Telephony</em> (2nd Edition for Asterisk 1.4), by Jim van Meggelen, Jared Smith, and Leif Madsen.<br /> This work is licensed under the <a href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Attribution-Noncommercial-No Derivative Works License v3.0</a>.<br /> To submit comments, corrections, or other contributions to the text, please visit <a href="http://oreilly.com/catalog/9780596510480/">http://www.oreilly.com/</a>.</p></div></body></html>