Derived Values in Core Data

Question

Using Core Data - I have created a named NSManagedObject that has both a start time and end time.
I'd like to display a list of these Session and I'd like the SECTION headers to break per day, based on a Session's start date. So, I'm storing a time - and I need to group by a date.
Would I simply add a readonly property 'startDate' to the literal Session code (.h,.m) that Core Data generated from my data model - in which I would derive the start date from the start time? or would this be a case for declaring a 'transient' property in my Core Data model? I don't exactly know when to use or not to use Transient properties.
It would be used as follows:
fetchedResultsController_ =
[[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest
managedObjectContext:managedObjectContext_
sectionNameKeyPath:@"startDate"
cacheName:cacheName];
Will this manually defined property actually work in this method?
-Luther

Answer 1

Dear Abir,
Thanks a lot for your exact reply.
In tracking tab of UWL what you see is NOT the description given for workflow, it is the Work Item Text for that workflow.
This is absoltely correct. I inserted the container variables in workitem text from PFTC as you suggested. It worked like a Magic!!!
KR,
Bharath