What type of requisite should be indicated (number or reference to the directory)?

Question

1C

Hello. I am writing a statement for a programmer, describing a document (report). Tell me please!
There is a table (report):
Number of cars: 5
Training operation group: 3
There is a prop "Training operation group" - this is the number of cars out of the total number that have the "Training" operation group
Please tell me how to fill in the description correctly, which will be as clear as possible to the programmer .
So?
Operation group:
The value is obtained automatically, from the “Availability of vehicles” register, the “Available” resource if the entry with “+”, the date is “01.01.next year following the current year”, operation group = training.

Answer 1

A link to a manual is preferred.

Answer 2

If you need to get the number of cars, then the number, if specifically auto, then the link.