I suppose you're talking about the attribute points?
Yeah, basically, you're right.
Focus is mainly for gun and stealth attacks, Perception for Martial Arts and Reason for hackers and Coders (except Code Shapers, where the proxies might benefit from other attributes, like Aikido Simulacra from Perception).
If you want a detailed explanation of what the attributes do exactly, go to mxovault.com and check the attribute guides there. I hope it helps you.