 database).
</p></dd>
<dt><code>-H have</code></dt>
<dd><p>Use <code>have</code> unit for conversion. The default is the reply to the prompt.
</p></dd>
<dt><code>-W want</code></dt>
<dd><p>Use <code>want</code> unit for conversion. An empty string requests the definition of
the <code>have</code> unit. The default is the reply to the prompt.
</p></dd>
<dt><code>XML_file</code></dt>
<dd><p>The pathname of the XML-formatted units database.
If not specified, then the default, compile-time pathname is used.
</p>