parsing behavior of a subrule without/with a repetition specifier

Hi,
I have a question about the behavior of a subrule with/without a
repetition specifier; 
more specifically, is the parsing behavior of

	program: statement

equivalent to the counterpart of 

	program: statement(1)

EXCEPT for their resulting data structures (former: a scalar; latter: a
reference to an array)
or something else?

While the documentation clearly explains repetition cases (0..N), so far
I could not find a sentence or paragraph that answers the above
question.

Any help is appreciated.


Akio Sone

[email protected]