protected static function findField($fieldRef, EarthIT_Schema_ResourceClass $rc, $fuzzyMatch = false)
 {
     if ($fuzzyMatch) {
         $fieldRef = EarthIT_Schema_WordUtil::minimize($fieldRef);
         foreach ($rc->getFields() as $fn => $f) {
             if ($fieldRef === EarthIT_Schema_WordUtil::minimize($fn)) {
                 return $f;
             }
         }
         return null;
     } else {
         return $rc->getField($fieldRef);
     }
 }