Thanks Terrin, that is a nice way to group them and when I add trade skills they can group into a trade category. I like the idea of a button to show/hide untrained skills.
Some skills fall into the realm of only being used in reference to an attribute, however, the skill test in game utilizes the attribute fitting the action. For instance, all skills being used to defend against a melee or ranged attack use Dexterity, however skills used to defend against magical attacks such as Resist Air use Perception.
Likewise, attacking with a melee or ranged weapon utilizes Strength but spells require Intelligence.
Also, the elemental magical skills will have spells that do damage and some that provide protection, within the realm of the elemental skill but all will be tested against Intelligence.
There are some complexities there that I hope will not become to complex, which is why I did not document them so as not to confuse, which hopefully I have not done here. :)
You guys have some great ideas and suggestions though, keep them coming, I will keep putting them on "the list" and they will start showing up in the game.