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