Linking to an event from FOAF

Hi,

At #rdfig we were trying to find out a way to link to
a particular event from a FOAF file. In no time Libby had
this example:

  http://swordfish.rdfweb.org/discovery/2003/09/foafcal/foafattend.rdf

That seems great for birthday parties. But a conference would
most probably have it's own RDF calendar published.
Following is what I'm suggesting:

<ical:Vevent>
  <ical:attendee rdf:nodeID="me"/>
  <rdfs:seeAlso rdf:resource="http://www2004.org/calendar/events.rdf"/>
  <ical:uid>0a780655c6a8437d62b02cf24e0381837b870963</ical:uid>
  <ical:summary>www2004</ical:summary>
  <ical:url rdf:resource="http://www2004.org"/>
</ical:Vevent>

Here ical:uid is used to point to an event within events.rdf. And 
ical:url is used instead of foaf:homepage, because it seems more 
appropriate.

Comments?

Thanks,
Vinay