Information required for developing ER diagram of Bugzilla database.

[sadia aina]

hi,

I am working on the entity relationship diagram of
bugzilla database. I got few questions .

1. I have gone through the entire database and there
is one thing strange ,there is not Foreign key
specified for any primary key. so how to figure out
the refrential integrity between the tables.

2. Is there any rationale behind not specifying
foreign keys.

waiting for reply

Aina Sadia
MS student(University of Alberta. Canada) 

__________________________________
Do you Yahoo!?
Yahoo! Calendar - Free online calendar with sync to Outlook(TM).
http://calendar.yahoo.com