Dear Gussj,
I will try to explain it my words,
The CAIPS is a software that officers in all Canadian embassies around the world are using while they are processing our immigration files,once they calculate the points they mention that in CAIPS , and when they send the MR they mention it , so the Caips show us all the immigration process step by step,but if they have not started processing the file yet that u need to know about , the Caips notes will be empty.
So the Caips notes are the scanning notes of what the officers have succeeded with specific immigration file.
i think it is not that clear but if u have any questions just go ahead......