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Title: The XML Schema Complete Reference by Cliff Binstock, Dave Peterson, Mitchell Smith ISBN: 0-672-32374-5 Publisher: Addison-Wesley Pub Co Pub. Date: 26 September, 2002 Format: Paperback Volumes: 1 List Price(USD): $59.99 |
Average Customer Rating: 3.67 (3 reviews)
Rating: 5
Summary: Use this book all the time
Comment: I've been doing a whole bunch of schema development work lately and I find that I've been referring to this book frequently. My only criticism is that the some of the early chapters are a little too theoretical for a plain old programmer like myself--but the extensive reference material provides me with all the information that I've needed to build a complex set of interlocking schemas.
Rating: 1
Summary: Little better than the public domain XML Schema docs
Comment: I have been using this book in an attempt to learn to read,
understand and write schemas. The only virtue this book has
is that it is a huge compendium (900+ pages) on the XML Schema.
However, it appears to have been created by taking the public
domain XML Schema documentaton (from W3), editing it a bit
and then sending it off to Addison Wesley.
XML Schema are fantasticly complex. Far more complicated than
grammars for programming languages (e.g., an ANTLR grammar).
Schemas support something akin to subclassing in an object
oriented language. However, in classic Schema fashion, it is
convoluted and difficult to understand. This book provided
no help in understanding "abstract types".
Even for simple elements of the schema this book simply lists
the syntax for the schema. What would have been FAR more useful
would have been to list schema elements, along with the XML that
they describe.
The world would be a far better place if XML Schemas faded
away like the poisonous miasma they are. But since they
seem to be here to stay, having somehow gathered a critical
mass of users, a good reference is needed. I have not
read the O'Reilly book "XML Schemas" but its got to
be better than this. Unless you simply want a bound copy of
the W3 documentation, save your money.
Finally, as if the content were not injury enough, the page
numbers in the index in my book did not correspond to the
page numbers of the topic (they were off by a few pages).
Since in a book like this one frequently references the
index, this is a real problem.
Rating: 5
Summary: Need Help Writing Your Own Schemas? Try this.
Comment: If you are already using XML, it is probably with DTDs, as this was the first implementation of XML. Both came out of SGML, in which the role of DTDs was defined in the early 1990s. Unfortunately, the drawbacks of DTDs were not fully appreciated until they began to be widely used in XML. A DTD cannot easily constrain an integer variable to a range of values from 5 to 10, say. It has no conception of common primitive types like float or double found in many programming languages. Also, the structure of a DTD is quite unlike that of the XML document it supports. From the point of view of writing parsers, you end up effectively needing two parsing algorithms to read a DTD and an XML document. XML Schemas answer all these issues. Plus namespaces are built into them, to handle collisions in tag names when you use multiple Schemas in a document. With DTDs, namespaces came into being after DTDs were first defined, and had to be bolted on in a most awkward fashion. XML Schema notation for namespaces is much more natural.
The problem right now with XML Schema is that it is new. Most XML books use DTDs, in part because when they were written, the Schema specification was not finished by W3C (in May 2001). Some XML books since then do describe Schema. They usually give a good overview and provide examples that work for the XML document examples they describe. So if you have an application that you want to write a Schema for, you can get started. But chances are, you soon run into problems if your application is not a carbon copy of a text's example. You soon need some Schema component or attribute whose usage or even existence was not disclosed in that book.
This book addresses that shortfall. It provides at least one example of how to use every attribute of EVERY Schema element. A formidably comprehensive task. Which accounts for the near thousand page size. But this is far more than just some dictionary-style exposition. They describe important closely related issues, like how to use the DOM and Xerces SAX parsers, and the different outlooks these take. Also, from your viewpoint of how to write a Schema for YOUR application, they offer a top-down approach. Schemas can be result-oriented or data-oriented. You get enough details to help decide which case yours fits. This can greatly aid developing a facile "natural" Schema. One where once you have it and an example XML document that uses it, the layout taxonomy seems axiomatic. Which should be your goal. It is not enough to define a Schema that can hold all the information you have. The skill is in making a Schema that does that and has a clear, obvious logic. Because in many cases others, probably not as technically adept as you, get to fill in documents based on it. So the logic should be clear to them. Even if they do not directly write into an XML document, but build it from a GUI, the clearer the Schema, the easier it is for someone to build a GUI to populate a document based on it.
The authors also provide a website (XMLSchemaReference.com) that has the code described in the book, and many more examples. Worth bookmarking.
So try this book and its website if you need an authoritative guide to writing Schemas.
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Title: XML Schemas by Lucinda Dykes, Ed Tittel, Chelsea Valentine ISBN: 0782140459 Publisher: Sybex Pub. Date: 18 January, 2002 List Price(USD): $49.99 |
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Title: Definitive XML Schema by Priscilla Walmsley ISBN: 0130655678 Publisher: Prentice Hall PTR Pub. Date: 07 December, 2001 List Price(USD): $49.99 |
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Title: XML Schema Essentials by R. Allen Wyke, Andrew Watt ISBN: 0471412597 Publisher: John Wiley & Sons Pub. Date: 15 June, 2002 List Price(USD): $44.99 |
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Title: XSLT : Programmer's Reference by Michael Kay ISBN: 0764543814 Publisher: Wrox Pub. Date: 03 May, 2001 List Price(USD): $34.99 |
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Title: XPath, XLink, XPointer, and XML: A Practical Guide to Web Hyperlinking and Transclusion by Erik Wilde, David Lowe ISBN: 0201703440 Publisher: Addison-Wesley Pub Co Pub. Date: 23 July, 2002 List Price(USD): $39.99 |
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