Rating: 

The first 6 chapters cover the basics of RDF. The book does a good job of introducing RDF basics, but I do feel the book ramped up a bit too quickly. I'll definitely have to re-read soem of those chapters to make sure I really understand the concepts. The diagrams in these chapters were really good at helping explain the concepts. I only wish there were more of them.

Chapters 8-11 cover different RDF libraries and RDF applications. I found these chapters useless. It was interesting to see some of the programming models that I could use do work with RDF, but I bought the book to learn about RDF, not about perl or python APIs.

Chapters 12-15 give good coverage of a number of technologies that use RDF. I found these chapters quite interesting. I felt Chapter 13 on RSS (even though it is limited to the RDF variants of RSS) gave better coverage of RSS than Content Syndication with RSS (which ought to be called "RSS Programming using Perl"). I wish there had been more coverage of the creative commons license and Friend of a friend.

At 300 pages, the book was a good length. I wish there had been more of the first and third sections and less of the middle section. I feel I got my money's worth as a complete RDF newbie, but I wonder if the book would provide as much value someone who already has the basics of RDF down. I can't answer that, but I can say that if you want a thorough introduction to RDF concepts, this book is great.