Is a new SI_ID created every time the InfoObject data changes in the CMS?

Question

I'm trying to create a process that records the FRS file path and file name of every InfoObject created in the CMS and associate it with a timestamp and a friendly report name.
As this process runs the big question is does it need to crawl the entire CMS every time looking for changes in previously created InfoObjects or is a new SI_ID, and by extension new file path and name, created every time the InfoObject data changes in the CMS?
I'm hoping it is the latter. Obviously the actual SI_ID creation behavior changes the code quite a bit. Any help would be appreciated.
Thanks.

Answer 1

Just want to make sure we're on the same page here.
If a User takes an infoObject and updates the file associated with an infoObject, then neither the SI_ID or the SI_CUID will change.  Any changes to properties of the infoObject won't trigger changes to its SI_ID or SI_CUID value. 
However, SI_UPDATE_TS will change with modification of the InfoObject:
http://devlibrary.businessobjects.com/businessobjectsxir2/en/en/BOE_SDK/boesdk_dotNet_doc/doc/boesdk_net_doc/html/QueryLanguageReference177.html
So that may be what you're interested in.  Note that SI_UPDATE_TS is an indexed property in the CMS repository database, so a query that filters on SI_UPDATE_TS (such as SI_UPDATE_TS > '2006.02.02') wouldn't be too slow.
One danger to your scheme - it'll pick up updates to the InfoObject, but not to related InfoObjects (such as Web Intelligence - Universe relationships).  Working out all the necessary relationships may be daunting.
Sincerely,
Ted Ueda