<?xml version="1.0" encoding="utf-8"?>
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<appendix xml:id="yac.constants" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 &reftitle.constants;
 &extension.constants;
 <para>
  <variablelist>
   <varlistentry xml:id="constant.yac-version">
    <term>
     <constant>YAC_VERSION</constant>
     (<type>string</type>)
    </term>
    <listitem>
     <simpara>
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.yac-max-key-len">
    <term>
     <constant>YAC_MAX_KEY_LEN</constant>
     (<type>int</type>)
    </term>
    <listitem>
     <simpara>
      Max length of a key could be, it is 48 bytes.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.yac-max-value-raw-len">
    <term>
     <constant>YAC_MAX_VALUE_RAW_LEN</constant>
     (<type>int</type>)
    </term>
    <listitem>
     <simpara>
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.yac-max-raw-compressed-len">
    <term>
     <constant>YAC_MAX_RAW_COMPRESSED_LEN</constant>
     (<type>int</type>)
    </term>
    <listitem>
     <simpara>
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.yac-serializer-php">
    <term>
     <constant>YAC_SERIALIZER_PHP</constant>
     (<type>int</type>)
    </term>
    <listitem>
     <simpara>
      Use php serialize as serializer
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.yac-serializer-json">
    <term>
     <constant>YAC_SERIALIZER_JSON</constant>
     (<type>int</type>)
    </term>
    <listitem>
     <simpara>
      Use json as serializer(requrie --enable-json)
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.yac-serializer-igbinary">
    <term>
     <constant>YAC_SERIALIZER_IGBINARY</constant>
     (<type>int</type>)
    </term>
    <listitem>
     <simpara>
      Use igbinary as serializer(require --enable-igbinary)
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.yac-serializer-msgpack">
    <term>
     <constant>YAC_SERIALIZER_MSGPACK</constant>
     (<type>int</type>)
    </term>
    <listitem>
     <simpara>
      Use msgpack as serializer(require --enable-msgpack)
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.yac-serializer">
    <term>
     <constant>YAC_SERIALIZER</constant>
     (<type>string</type>)
    </term>
    <listitem>
     <simpara>
       Which serialzier is yac used
     </simpara>
    </listitem>
   </varlistentry>
  </variablelist>
 </para>
</appendix>

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