newbie question: "is" vs "as"

What's the difference between "is" and "as" when used at the end of the create statement?

i.e.
create or replace procedure seanProc1 is begin

    dbms_output.put_line('hello world'); end;
/

vs.

create or replace procedure seanProc1 as begin

    dbms_output.put_line('hello world'); end;
/
Received on Thu Feb 22 2007 - 19:52:55 CST