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annotate xml/ru/docs/http/ngx_http_map_module.xml @ 617:368a449e85b8

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Expanded documentation of what various parameters of the "listen" directive related to socket options do. While here, documented the fact that accept filters also work on NetBSD.
author Ruslan Ermilov <ru@nginx.com>
date Thu, 02 Aug 2012 13:24:07 +0000
parents 764fbac1b8b4
children 77a3314c74a7
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1 <?xml version="1.0"?>
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2
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3 <!--
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4 Copyright (C) Igor Sysoev
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5 Copyright (C) Nginx, Inc.
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6 -->
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7
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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9
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10 <module name="Модуль ngx_http_map_module"
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11 link="/ru/docs/http/ngx_http_map_module.html"
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12 lang="ru"
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13 rev="1">
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14
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15 <section id="summary">
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16
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17 <para>
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18 Модуль <literal>ngx_http_map_module</literal> создаёт переменные,
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19 значения которых зависят от значений других переменных.
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20 </para>
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21
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22 </section>
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23
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24
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25 <section id="example" name="Пример конфигурации">
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26
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27 <para>
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28 <example>
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29 map $http_host $name {
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30 hostnames;
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31
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32 default 0;
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33
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34 example.com 1;
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35 *.example.com 1;
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36 example.org 2;
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37 *.example.org 2;
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38 .example.net 3;
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39 wap.* 4;
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40 }
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41
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42 map $http_user_agent $mobile {
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43 default 0;
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44 "~Opera Mini" 1;
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45 }
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46 </example>
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47 </para>
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48
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49 </section>
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50
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51
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52 <section id="directives" name="Директивы">
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53
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54 <directive name="map">
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55 <syntax block="yes">
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56 <value>строка</value>
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57 <value>$переменная</value></syntax>
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58 <default/>
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59 <context>http</context>
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60
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61 <para>
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62 Создаёт новую переменную, значение которой
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63 зависит от значений одной или более исходных переменных,
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64 указанных в первом параметре.
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65 <note>
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66 До версии 0.9.0 в качестве первого параметра можно было
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67 указать только одну переменную.
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68 </note>
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69 </para>
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70
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71 <para>
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72 Параметры внутри блока <literal>map</literal> задают соответствие
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73 между исходными и результирующими значениями.
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74 </para>
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75
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76 <para>
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77 Исходные значения задаются строками или регулярными выражениями (0.9.6).
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78 </para>
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79
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80 <para>
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81 Перед регулярным выражением ставится символ “<literal>~</literal>”,
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82 если при сравнении следует учитывать регистр символов, либо символы
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83 “<literal>~*</literal>” (1.0.4), если регистр символов учитывать не нужно.
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84 Регулярное выражение может содержать именованные и позиционные выделения,
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85 которые могут затем использоваться в других директивах совместно с
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86 результирующей переменной.
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87 </para>
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88
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89 <para>
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90 Если исходное значение совпадает с именем одного из специальных параметров
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91 (см. ниже), перед ним следует поставить символ “<literal>\</literal>”.
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92 </para>
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93
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94 <para>
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95 В качестве результирующего значения можно указать строку
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96 или другую переменную (0.9.0).
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97 </para>
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98
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99 <para>
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100 Директива также поддерживает три специальных параметра:
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101 <list type="tag">
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102 <tag-name><literal>default</literal> <value>значение</value></tag-name>
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103 <tag-desc>
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104 задаёт результирующее значение, если исходное значение не
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105 совпадает ни с одним из перечисленных.
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106 Если параметр <literal>default</literal> не указан, результирующим значением
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107 по умолчанию будет пустая строка.
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108 </tag-desc>
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109
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110 <tag-name><literal>hostnames</literal></tag-name>
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111 <tag-desc>
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112 указывает, что в качестве исходных значений можно
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113 использовать маску для первой или последней части имени хоста, например,
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114 <example>
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115 *.example.com 1;
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116 example.* 1;
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117 </example>
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118 Вместо двух записей
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119 <example>
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120 example.com 1;
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121 *.example.com 1;
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122 </example>
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123 можно использовать одну:
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124 <example>
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125 .example.com 1;
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126 </example>
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127 Этот параметр следует указывать перед списком значений.
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128 </tag-desc>
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129
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130 <tag-name><literal>include</literal> <value>файл</value></tag-name>
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131 <tag-desc>
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132 включает файл со значениями.
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133 Включений может быть несколько.
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134 </tag-desc>
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135
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136 </list>
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137 </para>
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138
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139 <para>
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140 Если исходному значению соответствует несколько из указанных вариантов,
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141 например, одновременно подходят и маска, и регулярное выражение,
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142 будет выбран первый подходящий вариант в следующем порядке приоритета:
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143 <list type="enum">
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144
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145 <listitem>
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146 строковое значение без маски
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147 </listitem>
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148
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149 <listitem>
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150 самое длинное строковое значение с маской в начале,
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151 например “<literal>*.example.com</literal>”
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152 </listitem>
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153
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154 <listitem>
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155 самое длинное строковое значение с маской в конце,
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156 например “<literal>mail.*</literal>”
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157 </listitem>
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158
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159 <listitem>
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160 первое подходящее регулярное выражение
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161 (в порядке следования в конфигурационном файле)
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162 </listitem>
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163
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164 <listitem>
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165 значение по умолчанию (<literal>default</literal>)
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166 </listitem>
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167
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168 </list>
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169 </para>
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170
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171 </directive>
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172
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173
346
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174 <directive name="map_hash_bucket_size">
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175 <syntax><value>размер</value></syntax>
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176 <default>32|64|128</default>
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177 <context>http</context>
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178
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179 <para>
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180 Задаёт размер корзины в хэш-таблицах для переменных <link id="map"/>.
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181 Значение по умолчанию зависит от размера строки кэша процессора.
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182 Подробнее смотрите в документе по
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183 <link doc="../hash.xml">настройке хэшей</link>.
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184 </para>
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185
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186 </directive>
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187
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188
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189 <directive name="map_hash_max_size">
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190 <syntax><value>размер</value></syntax>
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191 <default>2048</default>
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192 <context>http</context>
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193
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194 <para>
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195 Задаёт максимальный размер хэш-таблиц для переменных <link id="map"/>.
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196 Подробнее смотрите в документе по
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197 <link doc="../hash.xml">настройке хэшей</link>.
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198 </para>
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199
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200 </directive>
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201
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202 </section>
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203
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204 </module>