Hi,

How can i create one-to-one relationship between two custom objects in salesforce.com. 

Example: I have two custom objects having following details:

1) Employee (Name, PanCardNo)

2)PanCard(PanCardNo Name_on_card)

I have gone through documents of salesforce, but i can able to find out only lookup (One-to-many raltionship) and master-detail relationship(many-to-many relationship).

Is there any way to create one-to-one relationship??

Regards

kamlesh kumar