I’ve put up a first draft of my explanation of “open spectrum” on LogicError.
I also have an early draft of RDF Primer Primer up, which aims to get you understanding and using RDF as soon as possible.
I have plans to make changes to both of these, but I won’t have time to fix them for a while. So please read through them, and tell me what you think. Were there parts that were confusing or wrong? Let me know so I can fix them. Thanks!