ml">Passive scanning</a> - 
this allows you to automatically tag pages which match a particular regular expression.<br/>
</p>
<p>
Tags are shown in the <a href="../../ui/tabs/history.html">History tab</a> and can be filtered on using
the <a href="../../ui/dialogs/hist_filter.html">History Filter dialog</a>.<br/>
</p>
<h3>Alert Tags</h3>
If a History tag starts with <code>ALERT-TAG:</code> then the tag will also be associated
with any alerts raised against that request. 
The prefix will be dropped, and if th