How to create one to one relation in database diagram

Hi!
I'd like to create a database diagram in JDeveloper 10g. Is there any possibility to create a one-to-one relation between two tables?
Thanks in advance,
Jim

This seems to be the same problem that I am having. I was trying to create a database diagram with tables imported from the database. I have two tables having a 1 --> 0..1 relationship. However when I pulled these tables on to a database diagram , it displayed as a 1 --> * relationship. I also realized that JDeveloper does not allow you to change the cardinality in a database diagram.
As a workaround, I created a class diagram and named the classes the same as the database tables. Then I used UML connectors to show the relationships with the correct cardinality. Since I did not need to show the column names on the diagram, it was sufficient for my purpose. I hope this bug is fixed soon, otherwise I will have to use some other tool to create database diagrams.

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thanks again before,
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