title: Zabbix - calculated item function over multiple items
body: <p>From the Zabbix Manual 
  the calculated items expression follows the form,</p>
  
  <pre><code>func(&lt;key&gt;|&lt;hostname:key&gt;,&lt;parameter1&gt;,&lt;parameter2&gt;,...)
  </code></pre>
  
  <p>This is fine for computations using functions over a single item like,</p>
  
  <pre><code>max("temp1",120)
  </code></pre>
  
  <p>How should a function like min() be applied over 3 <strong>different</strong> items so it returns the lowest of those?</p>