=over 4
-=item begin - epoch date (UNIX timestamp) setting a lower bound for _date values
+=item begin
-=item end - epoch date (UNIX timestamp) setting an upper bound for _date values
+Epoch date (UNIX timestamp) setting a lower bound for _date values
+
+=item end
+
+Epoch date (UNIX timestamp) setting an upper bound for _date values
=item invnum_min