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<section id="bbv2.reference.set">
  <title>setモジュール</title>
  <synopsis><emphasis role="bold">module</emphasis> set {
  <emphasis role="bold">rule</emphasis> <link linkend="bbv2.reference.set.difference">difference</link> ( B * : A * ) { }
}
</synopsis>
  <refentry id="bbv2.reference.set.difference">
    <refmeta>
      <refentrytitle>difference</refentrytitle>
      <manvolnum>7</manvolnum>
    </refmeta>
    <refnamediv>
      <refname>set.difference</refname>
      <refpurpose><simpara>差集合を求める</simpara></refpurpose>
    </refnamediv>
    <refsynopsisdiv>
      <programlisting><emphasis role="bold">rule</emphasis> difference ( B * : A * )</programlisting>
    </refsynopsisdiv>
    <refsection>
      <title>Description</title>
      <para><code>B</code>に含まれ、<code>A</code>に含まれない文字列のリストを返す。</para>
    </refsection>
  </refentry>
</section>
