[ic] Foreign Key

[Alberto Speggiorin]

Hi all,
I am new to IC and I was looking for info about the implementation of 
the foreign keys since I am using Postgresql db.
I found this note in the ictags [data]  tags reference:
Foreign Keys  Russell Mann

An undocumented feature is the foreign key: [data table=table 
column=column key=key foreign=foreign] will work if there is only one 
corresponding entry in the database.

I was wondering if someone knows if  there the change to use more than 
one foreign keys and if this option foreing is working.
TKS

Alberto