iwattrib crdate field - how's it determined?

System

Hi all -
I'm testing some metadata and file attributes in the Backing Store and have the following question:

How is the crdate value set and updated?

I can check the create date (crdate) on a file with iwattrib, then go make a simple update to the file, then go requery the crdate value and it seems to get updated along with the moddate. I'd think the crdate on a file would get set once and remain the same. Do I need to trace the history of the file back as far as I can to get the true crdate?

Wally Box
Nike, Inc.