RDF Primer Primer

RDF Primer Primer“The Resource Description Framework (RDF) is a system for storing and sharing data between computer programs. This document will help you understand the important pieces of RDF quickly and then walk you through writing your own RDF files, and creating your own types of RDF information (often called RDF vocabularies or schemas).”

A good introduction to what RDF looks like although I had to read the bit about reification  couple of times to get it.