Hi,
A non-identifying relationship represents a relationship between two
independent tables.
the foreign key of the child table doesnot comtain all of the primary key
columns.
while in case of identifying relationship it is relationship between two
dependent tables.
child table cannot exit without parent table.
ed: account table and person---identifying
eg : depatment table and employee table ---non-identifying
the deptno foriegnkey(fk) of emp table say deptno doesnot comtain all of the
primary key columns.(empno is PK)
An "ASSOCIATION" maps to a non-identifying relationship
regarding cardinality i think it is M:N(many to many relationhip)
0..1 --- 0..*
represented by an additional table known as assosiate table.
See Rational White Paper "Mapping Objects to datamodel with the UML" in
www.rational.net
Martin Paul
----- Original Message -----
From: "Vasudha Bhushan" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Cc: "Rangu Dutta" <[EMAIL PROTECTED]>; "Prashant Pandey"
<[EMAIL PROTECTED]>; "Hariharan Sampath Kumaran"
<[EMAIL PROTECTED]>; "Vishweshwara Swamy"
<[EMAIL PROTECTED]>
Sent: Thursday, February 06, 2003 10:11 AM
Subject: (ROSE) RE: Clarification Reqd..
What is the meaning of 0..1 --- 0..* cardinality ??
How to represent non-identifying and optional relation in Rational Rose
?
Any suggetion or solution on the same will be helpful.
Regards,
Vasudha.
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