Stefano Mazzochi has written a guide to RDF for XML people — the very readable, first part (great!) of a no-nonsense guide to the Semantic Web.
This is a single archived entry from Stefan Tilkov’s blog. For more up-to-date content, check out my author page at INNOQ, which has more information about me and also contains a list of published talks, podcasts, and articles. Or you can check out the full archive.