}
</pre>

<h4 id="General_interfaces">General interfaces</h4>

<p>
In their most general form, an interface element may also be an arbitrary type term
<code>T</code>, or a term of the form <code>~T</code> specifying the underlying type <code>T</code>,
or a union of terms <code>t<sub>1</sub>|t<sub>2</sub>|…|t<sub>n</sub></code>
[<a href="#Go_1.18">Go 1.18</a>].

    <magic priority="20">
      <match value="FORM....AIFF" type="string" offset="0"
             mask="0xFFFFFFFF00000000FFFFFFFF"/>
      <match value="FORM....AIFC" type="string" offset="0"
             mask="0xFFFFFFFF00000000FFFFFFFF"/>
      <!-- Amiga IFF sound sample, somewhat like the more modern AIFF -->
      <match value="FORM....8SVX" type="string" offset="0"