The Swasbuckler is the master of fencing and as such is restricted in armor and weapon use as follows:

Allowable weapons:
Sabre, Scimitar, Blade, Falchion, Short Sword and dagger.

The Swashbuckler may use clubs (those thingys by the ship masts!)

Allowable armor:
Any type of armor up to and including Studded Leather may be worn. Any type of helm may be used (Fencing masks!) Shield use is forbidden.

The Swashbuckler is unable to commit magic spells to memory (ie. no reading books), but they may use scrolls and potions as well as any magical varieties of allowable equipment and jewelry (they DO love their jewelry!).

I imagine the Swashbuckler as being played as either a Warrior or a Rogue (It just depends on if you would rather have a high strength or dex).