I know that each "file". can be part of many tabbles. BUT can tabbles themselves have multiple parents too.
Here’s a common example for a student.

1st Year
probability
math methods
programming
2nd Year
dynamics
interface design

Computer Science
programming
interface design
Maths
probability
math methods
dynamics

Thing is, when i tag a file with programming, say, i have to also add the tabble "1st year" also, rather than it already knowing that programming is a child of computer science AND 1st year.

(if this is already covered please explain how to do it)