]> http://sample.org pd &dc;publisher &w3;W3C &dc;date 2008-04-04 item deliverydate scheduledate diffduration diffdays &cpt;perishable item &cpt;delivered item deliverydate &ppl;John &cpt;scheduled item scheduledate &fn;subtract-dateTimes-yielding-dayTimeDuration deliverydate scheduledate diffduration &fn;get-days-from-dayTimeDuration diffduration diffdays &op;numeric-greater-than diffdays 10 &cpt;reject &ppl;John item item &cpt;unsolicited item &cpt;reject &ppl;Fred item