Re: CASE Methodology question

In article <40ou6e$9a7_at_ixnews4.ix.netcom.com>, Suresh P. Anantpurkar <anantpur_at_ix.netcom.com> wrote:

>Questions on Oracle CASE Methodology....
>Hi,
>I have couple of questions on defining functions in the CASE tool.
 

> How do you decide which function is a elementary function?

[example deleted]

Simplicity itself. An elementary function is one that takes the database from a consistent state and leaves it in a consistent state -- from a business point of view.

If you allow order headers to exist without line items, then order header creation is elementary and is a separate function from the creation of line items.

If you don't, then they make up a single elementary function.

Note that you can have two or three Elementary Business Functions implemented by a single screen, i.e. one screen that creates the order header and its line items (in the case where these are two functions).

Was that sufficiently clear?

 -Tom

-- 
Thomas B. Cox   tcox_at_netcom.com
Author of _Oracle Workgroup Server Handbook_, ISBN 0-07-881186-4

...be seeing you at IOUW '95!