I'm not sure why this is being downvoted. I'll throw in my two cents (not the OP or anything):

It's not theoretical knowledge in the sense of "theoretical/applied physics", but rather theoretical knowledge because there is an extra step between it and application.

So if I give you a list of functions in a module/class and just tell you what they do, that is more theoretical than a code block that you can cut and paste as running code.

I'm not sure how else you would label this axis, theory/practical seems just fine.