function SetFilterFloatRange($attribute, $min, $max, $exclude = false)
{
assert(is_string($attribute));
assert(is_float($min));
assert(is_float($max));
assert($min <= $max);
$this->_filters[] = array("type" => SPH_FILTER_FLOATRANGE, "attr" => $attribute, "exclude" => $exclude, "min" => $min, "max" => $max);
}