I'll check and see if I can still find the link to a page that had drawings and pictures of different examples (correct and incorrect) of ears and their placement, tails and their length, how they were carried, etc. also, the correct topline. I know it was very informational and I learned alot about what to look for in a yorkie puppy/dog.
This may not be the exact site I was thinking of but it's the same information:
http://www.yorkiebaby.com/judge.html