hyperlinks in XML...?

[ric frankland]

i'm trying to add some hyperlinks to the text within the msg tags; please can someone tell me how to do this.... (with the link opening in a new browser window):

<?xml version="1.0"?>
<diary>
    <cal yearID="2006" monthID="0">
        <date id="1">
            <msg>an event</msg>
        </date>
        <date id="17">
            <msg>another event</msg>
        </date>
    </cal>
</diary>

cheers.