Weekend Learning: Where are Audit Trails for the PLM product?

Did you know that there are audit trails for the Product Lifecycle Management (PLM) module?  Well I didn't either!  MOS note 1612322.1 has a script to pull from the commonLifecycleEventLog table, linking it to several other tables, but I'm more interested to see what this log table has in our environment as we just installed a new module called PLM which I think is the same thing.  If this tracks the audit trails for every change, we'll need to get a handle on how it gets purged, and add it to our documentation!