Check out the other classes skills
They are pretty straight forward to read, however, ill explain it anyways.
Using Spell Sword as an example.
Below, you see, two arrows namely saying Purple Colour and Whiteish Green Colour.
Purple Colour will be skills exclusively for Sword Artist only.
While Whiteish Green Colour will be skills that are shared for the Spellsword Spec.
Then, you have the “Other spec” always in “Grey” side on the right to differentiate between the both.