Daniela Barbosa, who is the business development manager for Synaptica at Dow Jones Client Solutions has written a fabulous eBook explaining how to mix taxonomies built by professionals and folksonomies, which let users tag content as they see fit. On one hand you have a controlled system. On the other, you are putting the power to organize within reach of the masses, but this can get chaotic. How do you reconcile these two seemingly disparate goals?