User blog comment:Equillibrium/Elder Scrolls Online: Character Creation/@comment-98.65.235.159-20131031184621/@comment-5469467-20131101012025

There are four classes in Online (found here), and as far as I can tell they're basically tank (Dragonknight), caster (Sorcerer), rogue (Nightblade) and healer (Templar). The details surrounding skills and abilities open to each are a bit vague at the moment, but you might still be able to get an idea.