The content of the book is very appealing, but I found many problems:- a good knowledge of XML schema is required- a good knowledge of data modeling topics is requiredIf you have the required knowledge, you will find a lot of obvious things, that you maybe already know. Some hints and methodologies are useful, but they represent only a small portion of the book.If you don't have the required knowledge, you will find difficult understanding the "big picture" from which the ideas in the book are derived.I don't suggest buying this book.