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Changes to grep/manual/html_node/Regular-Expressions.html,v

From: Jim Meyering
Subject: Changes to grep/manual/html_node/Regular-Expressions.html,v
Date: Tue, 23 Mar 2010 12:04:31 +0000

CVSROOT:        /webcvs/grep
Module name:    grep
Changes by:     Jim Meyering <meyering> 10/03/23 12:04:22

Index: html_node/Regular-Expressions.html
RCS file: /webcvs/grep/grep/manual/html_node/Regular-Expressions.html,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -b -r1.1 -r1.2
--- html_node/Regular-Expressions.html  24 May 2009 18:42:59 -0000      1.1
+++ html_node/Regular-Expressions.html  23 Mar 2010 12:04:20 -0000      1.2
@@ -1,8 +1,8 @@
 <html lang="en">
-<title>Regular Expressions - GNU Grep 2.5.4</title>
+<title>Regular Expressions - GNU Grep 2.6</title>
 <meta http-equiv="Content-Type" content="text/html">
-<meta name="description" content="GNU Grep 2.5.4">
+<meta name="description" content="GNU Grep 2.6">
 <meta name="generator" content="makeinfo 4.13">
 <link title="Top" rel="start" href="index.html#Top">
 <link rel="prev" href="Invoking.html#Invoking" title="Invoking">
@@ -11,8 +11,8 @@
 This manual is for `grep', a pattern matching engine.
-Copyright (C) 1999, 2000, 2001, 2002, 2005, 2008, 2009 Free
-Software Foundation, Inc.
+Copyright (C) 1999-2002, 2005, 2008-2010 Free Software Foundation,
      Permission is granted to copy, distribute and/or modify this
      document under the terms of the GNU Free Documentation License,
@@ -46,18 +46,22 @@
 <h2 class="chapter">3 Regular Expressions</h2>
-<p><a name="index-regular-expressions-178"></a>
+<p><a name="index-regular-expressions-182"></a>
 A <dfn>regular expression</dfn> is a pattern that describes a set of strings. 
 Regular expressions are constructed analogously to arithmetic expressions,
 by using various operators to combine smaller expressions. 
 <samp><span class="command">grep</span></samp> understands
-two different versions of regular expression syntax:
-&ldquo;basic&rdquo;(BRE) and &ldquo;extended&rdquo;(ERE). 
+three different versions of regular expression syntax:
+&ldquo;basic,&rdquo; (BRE) &ldquo;extended&rdquo; (ERE) and 
 In <span class="sc">gnu</span> <samp><span class="command">grep</span></samp>,
-there is no difference in available functionality using either syntax. 
+there is no difference in available functionality between basic and
+extended syntaxes. 
 In other implementations, basic regular expressions are less powerful. 
 The following description applies to extended regular expressions;
 differences for basic regular expressions are summarized afterwards.
+Perl regular expressions give additional functionality, and are
+documented in pcresyntax(3) and pcrepattern(3), but may not be
+available on every system.
 <ul class="menu">
 <li><a accesskey="1" 

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