="border-top">
<tr>
<td style="white-space:nowrap">
<code>prefix</code><br>
<em>
string
</em>
</td>
<td>
<em>(Optional)</em>
<p>Prefix defines a prefix match for a request.</p>
</td>
</tr>
<tr>
<td style="white-space:nowrap">
<code>header</code><br>
<em>
<a href="#projectcontour.io/v1.HeaderCondition">
HeaderCondition
</a>
</em>
</td>
<td>
<em>(Optional)</em>
<p>Header specifies the header condition to match.</p>
</td>
</tr>
</tbody>
</table>
<h3 id="projectcontour.io/v1.HTTPHealthCheckPolicy">HTTPHealthChe