Professional XML Meta Data

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Summary: Learn lots of new interesting things happening in XML World!
Review: By now, I guess most of IT professionals have atleast heard about XML and know what problems XML can help solve, however it's challenging to keep up with fast evolving technologies around XML, like RDF, Topic Maps, Schemas, etc. I myself had heard about these technologies, but didn't quite understand them fully till I read Professional XML Meta Data from Wrox. As far as I know, this is the only book available in the market today that covers technologies useful for data description, discovery and exchange, in so much detail. The book covers XML Schemas, XML Linking and Querying, both the RDF specifications, Topic Maps and more. All the topics are explained in detail, the book is very well connected and the chapters flow nicely in sequence. I personally liked the final chapter "Advanced Meta Data Use Cases" that covers couple of areas where meta data can enhance the applications.

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Summary: THE book for XML metadata technologies.
Review: If you need to know about the latest XML metadata technologies or concepts like the Semantic Web and machine readable metadata, you need this book. I found it very useful in explaining RDF (there are three excellent chapters on RDF) and Topic Maps, which are potentially difficult subjects to understand. The book also suggests some interesting uses for metadata in the future, and has a useful chapter on extracting metadata from databases.

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Summary: Minimal coupling, minimal cohesion
Review: If you're looking for in-depth detailed information on RDF, XML Schema, DAML + OIL etc., then don't buy this book.
If you're interested in DAML + OIL, and applications of it, then you don't want this book. (It covers DAML + OIL, but only touches its surface.)
If you want to read about new standars rising from the XML community, and you don't have any particular preference, then this might be a book you like.
If you can't cope with minimal cohesion, then you definitely should not buy this book. There's no single message in this book.