Semi-off-topic question?

[TimHare]

Can someone tell me where to look to find out why everything has "Pace" 
appended to the front of it (PaceDateModified, PaceUpdatedDefinition, 
etcetera)? As a newcomer to the list, I haven't been able to relate the 
word to Atom (yet).

Tim Hare
Interested Bystander, Non-Inc.