Magic Forums

I have been doing some fairly extensive research into the different wights, specifically those under the category of Alfar. I plan on writing an in depth article talking about each of the Alfar. However, I have found many different things and have become confused on the Svartalfar, Dokkalfar, Swart Alfs, and Dwarves. Some sources use these interchangeably, where some say they are different. What is you're guys' opinion, I honestly need some help. Are Swart Alfs and the Svartalfar the same? Are Svartalfar and Dokkalfar the same? Is there a difference between them? Are the Dwarves Svartalfar?