time and location condition checking

Hello,

I have an XML set with the following format: -
<LOG>
       <LOCAL>
          <CHARACTER_ID> 13455 </CHARACTER_ID>
          <LOCATION_ID> 20709 </LOCATION_ID>
          <MESSAGE>still its a good idea.</MESSAGE>
      <TIME> 'Mon, 26 Nov 2001 17:08:58 +0000' </TIME>
     </LOCAL>
etc etc
</LOG>

I need to find the number of messages where there were
at least three unique character_id's in the same
location_id within say 10 seconds (either previously
or
afterwards) of each message.

I can use keys to capture the locations and
characters, but is it possible to test the TIME tag in
this way?

Yours stuck in a quandry

Marina

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