Below is an excerpt from the Nomenclature page, directly above what Bluemax wrote on the Nomenclature page.
The following is a list of the categories that players are rated in:
Jump Shot: A better shooter will make more shots at all distances.
Jump Range: A player with a higher jump range will find that the effectiveness of his jump shot decreases less with distance.
Perimeter Defense: A player with better perimeter defense will be more effective at defending against outside shots and pressuring ball handlers.
Handling: Allows the player to avoid losing the ball to the opposing defense while dribbling. Important against a pressing defense (to be added later) or, in general, against good perimeter defense. Teams with good handling will have more success at creating quality shot opportunities.
Driving: Allows the player to create his own shot without a good pass from a teammate. Better driving creates shots more often and creates better shots on average.
Passing: Helps to create good shots (and get assists). Bad passing can also lead to turnovers.
Inside Shot: A better inside shooter will make more two-point baskets.
Inside Defense: A player with better inside defense is better at preventing inside scoring by the opposition.
Rebounding: A good rebounder will retrieve the ball more often after a missed shot. Notice that height is already considered when a player's rebounding skill is displayed. A player who is 7'2" but has a low rebounding skill simply is very bad at positioning and will not get very many rebounds. He'll learn more quickly though...
Shot Blocking: Will help to block shots. Not very useful for perimeter players.
Stamina: A player with high stamina will tire more slowly, and can be effective for longer periods on the court.
Free Throw: Will help to make free throws. Interior players tend to be fouled more frequently, but this is a useful skill for everybody.