kie_value is often more useful.</td></tr>

<tr><td><code> get_qs_value(string(),rd()) -&gt; 'undefined' | string() </code></td><td>Given the name of a key, look up the corresponding value in the query string.</td></tr>
<tr><td><code> get_qs_value(string(),string(),rd()) -&gt; string() </code></td><td>Given the name of a key and a default value if not present, look up the corresponding value in the query string.</td></tr>
<tr><td><code> req_qs(rd()) -&gt; [{string(), string()}] </code></td><td>The parsed que