exceptionally poorly constructed reference book
A real need for further editions on this book. As others have commented, it's very poorly constructed, poorly indexed and you'll be hard-pressed to quickly find accurate definitions. As other posters have suggested, O'Reilly should be worried that this one got published in this state.
Semi-techie's evaluation
This book tells you what you need to know. However, it is a bit of a hard slog because it doesn't tell you why you need to know it. It also throws in obscure acronyms and not only expects you to know what they stand for, but what those protocols/standards/programs imply. Yes, you can learn all you need to know about SQL schema, (and more than you need to know - without telling you why you need to know it, you don't know what to skip), but it is a little more painful than it has to be.
It is not easy to read it but there is not so much of other books
XML Schema is used almost everywhere (in connection with XML documents, Web Services, SOAP etc.). So I as other people needed to master XML Schema. There is not a great choice of XML Schema books. Specification is already quite getting old. The book is not easy to read. I read it sequentially chapter after chapter and I mastered a lot of basic rules. The main problem now I see is, XML Schema itself does not give you too much of design freedom. Sometimes you need to define a structure (data type) according value of other elements. So now I know mainly what is not possible to do in XML Schema.
After all I have to recommend the book. You have to read it twice. So I have just bought another XML Schema book from Priscilla and I hope I will get to know XML Schema from other point of view.
Tough read
This book is very dry and terse. It has all of the required content but it doesn't provide much perspective of how it should be used. You could use it as a reference, but I recommend the XML Schema Companion before this one.
An Editing Nightmare
This book had potential to be a definitive guide to XML schema. This is not the kind of book you can pick up and read cover to cover (unless insomnia is a real condition for you, in which case this book may help). It is, by no means, a tutorial of XML schema - or even a reference. It's more of an exploratory academic walk of the W3C recommendation and all of its foibles and nuances. There is wealth of information in this book, if you can glean it out from inbetween the droning prose and historical diatribe.O'Reilly should be shamefully embarassed for ever letting this book go to print in the condition it is. It is replete with errata, typos, and slopped together examples. This book is destined to frustrate those new to XML schema. An uncharacteristicly poor level of quality for O'Reilly.
