/p>
<pre class="programlisting"><span class="identifier">program</span> <span class="special">=</span>
        <span class="identifier">programHeading</span> <span class="special">&gt;&gt;</span> <span class="identifier">block</span> <span class="special">&gt;&gt;</span> <span class="char">'.'</span>
    <span class="special">;</span>

<span class="identifier">block</span> <span class="special">=</span>
       <span class="special">*(</span>   <span class="identifier">labelDeclarationPart</span>
        <sp