I must admit I had no idea what yout guys were talking about. SPARS code?? ?? ??.
So I looked it up, and found this (in case anyone else may want to know):

"The Spars code contains a sequence of three letters, either "A" or "D." The "A" stands for analog, the "D" for digital. The first letter in the sequence tells you how the album was recorded; the second, how it was mixed; the third, how it was mastered.

Hence, a Spars code that reads "AAD" tells you the album was recorded and mixed on analog (i.e., magnetic tape) equipment, but mastered digitally; "ADD" tells you it was recorded on analog, but mixed and mastered digitally; "DDD" tells you it was recorded, mixed and mastered on digital equipment."

Source: [url]http://www.britannia.org/film/support/spars.shtml[/url]

And now that I know what a SPARS code is, I agree that it ought to be a permanent field in OCD.