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<title>PCRE specification</title>
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<h1>Perl-compatible Regular Expressions (PCRE)</h1>
<p>
The HTML documentation for PCRE comprises the following pages:
</p>

<table>
<tr><td><a href="pcre.html">pcre</a></td>
    <td>&nbsp;&nbsp;Introductory page</td></tr>

<tr><td><a href="pcre-config.html">pcre-config</a></td>
    <td>&nbsp;&nbsp;Information about the installation configuration</td></tr>

<tr><td><a href="pcreapi.html">pcreapi</a></td>
    <td>&nbsp;&nbsp;PCRE's native API</td></tr>

<tr><td><a href="pcrebuild.html">pcrebuild</a></td>
    <td>&nbsp;&nbsp;Options for building PCRE</td></tr>

<tr><td><a href="pcrecallout.html">pcrecallout</a></td>
    <td>&nbsp;&nbsp;The <i>callout</i> facility</td></tr>

<tr><td><a href="pcrecompat.html">pcrecompat</a></td>
    <td>&nbsp;&nbsp;Compability with Perl</td></tr>

<tr><td><a href="pcrecpp.html">pcrecpp</a></td>
    <td>&nbsp;&nbsp;The C++ wrapper for the PCRE library</td></tr>

<tr><td><a href="pcredemo.html">pcredemo</a></td>
    <td>&nbsp;&nbsp;A demonstration C program that uses the PCRE library</td></tr>

<tr><td><a href="pcregrep.html">pcregrep</a></td>
    <td>&nbsp;&nbsp;The <b>pcregrep</b> command</td></tr>

<tr><td><a href="pcrematching.html">pcrematching</a></td>
    <td>&nbsp;&nbsp;Discussion of the two matching algorithms</td></tr>

<tr><td><a href="pcrepartial.html">pcrepartial</a></td>
    <td>&nbsp;&nbsp;Using PCRE for partial matching</td></tr>

<tr><td><a href="pcrepattern.html">pcrepattern</a></td>
    <td>&nbsp;&nbsp;Specification of the regular expressions supported by PCRE</td></tr>

<tr><td><a href="pcreperform.html">pcreperform</a></td>
    <td>&nbsp;&nbsp;Some comments on performance</td></tr>

<tr><td><a href="pcreposix.html">pcreposix</a></td>
    <td>&nbsp;&nbsp;The POSIX API to the PCRE library</td></tr>

<tr><td><a href="pcreprecompile.html">pcreprecompile</a></td>
    <td>&nbsp;&nbsp;How to save and re-use compiled patterns</td></tr>

<tr><td><a href="pcresample.html">pcresample</a></td>
    <td>&nbsp;&nbsp;Discussion of the pcredemo program</td></tr>

<tr><td><a href="pcrestack.html">pcrestack</a></td>
    <td>&nbsp;&nbsp;Discussion of PCRE's stack usage</td></tr>

<tr><td><a href="pcresyntax.html">pcresyntax</a></td>
    <td>&nbsp;&nbsp;Syntax quick-reference summary</td></tr>

<tr><td><a href="pcretest.html">pcretest</a></td>
    <td>&nbsp;&nbsp;The <b>pcretest</b> command for testing PCRE</td></tr>
</table>

<p>
There are also individual pages that summarize the interface for each function 
in the library:
</p>

<table>    

<tr><td><a href="pcre_compile.html">pcre_compile</a></td>
    <td>&nbsp;&nbsp;Compile a regular expression</td></tr>

<tr><td><a href="pcre_compile2.html">pcre_compile2</a></td>
    <td>&nbsp;&nbsp;Compile a regular expression (alternate interface)</td></tr>

<tr><td><a href="pcre_config.html">pcre_config</a></td>
    <td>&nbsp;&nbsp;Show build-time configuration options</td></tr>

<tr><td><a href="pcre_copy_named_substring.html">pcre_copy_named_substring</a></td>
    <td>&nbsp;&nbsp;Extract named substring into given buffer</td></tr>

<tr><td><a href="pcre_copy_substring.html">pcre_copy_substring</a></td>
    <td>&nbsp;&nbsp;Extract numbered substring into given buffer</td></tr>

<tr><td><a href="pcre_dfa_exec.html">pcre_dfa_exec</a></td>
    <td>&nbsp;&nbsp;Match a compiled pattern to a subject string
    (DFA algorithm; <i>not</i> Perl compatible)</td></tr>

<tr><td><a href="pcre_exec.html">pcre_exec</a></td>
    <td>&nbsp;&nbsp;Match a compiled pattern to a subject string
    (Perl compatible)</td></tr>

<tr><td><a href="pcre_free_substring.html">pcre_free_substring</a></td>
    <td>&nbsp;&nbsp;Free extracted substring</td></tr>

<tr><td><a href="pcre_free_substring_list.html">pcre_free_substring_list</a></td>
    <td>&nbsp;&nbsp;Free list of extracted substrings</td></tr>

<tr><td><a href="pcre_fullinfo.html">pcre_fullinfo</a></td>
    <td>&nbsp;&nbsp;Extract information about a pattern</td></tr>

<tr><td><a href="pcre_get_named_substring.html">pcre_get_named_substring</a></td>
    <td>&nbsp;&nbsp;Extract named substring into new memory</td></tr>

<tr><td><a href="pcre_get_stringnumber.html">pcre_get_stringnumber</a></td>
    <td>&nbsp;&nbsp;Convert captured string name to number</td></tr>

<tr><td><a href="pcre_get_substring.html">pcre_get_substring</a></td>
    <td>&nbsp;&nbsp;Extract numbered substring into new memory</td></tr>

<tr><td><a href="pcre_get_substring_list.html">pcre_get_substring_list</a></td>
    <td>&nbsp;&nbsp;Extract all substrings into new memory</td></tr>

<tr><td><a href="pcre_info.html">pcre_info</a></td>
    <td>&nbsp;&nbsp;Obsolete information extraction function</td></tr>

<tr><td><a href="pcre_maketables.html">pcre_maketables</a></td>
    <td>&nbsp;&nbsp;Build character tables in current locale</td></tr>
    
<tr><td><a href="pcre_refcount.html">pcre_refcount</a></td>
    <td>&nbsp;&nbsp;Maintain reference count in compiled pattern</td></tr>

<tr><td><a href="pcre_study.html">pcre_study</a></td>
    <td>&nbsp;&nbsp;Study a compiled pattern</td></tr>

<tr><td><a href="pcre_version.html">pcre_version</a></td>
    <td>&nbsp;&nbsp;Return PCRE version and release date</td></tr>
</table>

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