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Very little space is wasted detailing the history of XML and its relation to SGML, as is the case in many other titles. The argument for the importance of XML is made quickly, and the basics of well-formed syntax are tackled right off. One notable distinction of this book is its excellent coverage of related technologies, such as cascading style sheets (CSS) and relational databases.

In addition to discussing the crucial companion standards to the core XML language (DTDs, XSL, and XSLT), the book adds a nice perspective to the broad range of applications in which XML can play a role. One section, "Other Uses for XML," illustrates how XML can be used to serialize object models, creating stateless objects and utilizing the Resource Description Framework (RDF). Case studies on--among other things--how XML can be used to build discussion groups, and provide B2B data transfer, round out the text. This book is perfect for Web programmers who are turning their attention to XML for the first time. It imparts a solid understanding of the XML forest and XML trees. --Stephen W. Plain

Topics covered:

• Well-formed XML
• Cascading style sheets (CSS)
• XSLT and Xpath
• Document Object Model (DOM)
• Simple API for XML (SAX)
• XML/database integration schemas
• Document Type Definitions (DTDs)
• Namespaces
• B2B data-transfer applications
• Discussion group applications

Extensible Markup Language (XML) is a rapidly maturing technology with powerful real-world applications, particularly for the management, display, and organization of data. Together with its many related technologies it is an essential technology for anyone using markup languages on the web or internally.

This book teaches you all you need to know about XML — what it is, how it works, what technologies surround it, and how it can best be used in a variety of situations, from simple data transfer to using XML in your web pages. It builds on the strengths of the first edition, and provides new material to reflect the changes in the XML landscape — notably SOAP and Web Services, and the publication of the XML Schemas Recommendation by the W3C.

What does this book cover?

Here are just a few of the things this book covers:

• XML syntax and writing well-formed XML
• Using XML Namespaces
• Transforming XML into other formats with XSLT
• XPath and XPointer for locating specific XML data
• XML Validation using DTDs and XML Schemas
• Manipulating XML documents with the DOM and SAX 2.0
• SOAP and Web Services
• Displaying XML using CSS and XSL
• Incorporating XML into tradition databases and n-tier architectures

Author Erik T. Ray begins with an excellent summary of XML's history as an outgrowth of SGML and HTML. He outlines very clearly the elements of markup, demystifying concepts such as attributes, entities, and namespaces with numerous clear examples. To illustrate a real-world XML application, he gives the reader a look at a document written in DocBook--a publicly available XML document type for publishing technical writings--and explains the sections of the document step by step. A more simplified version of DocBook is used later in the book to illustrate transformation--a powerful benefit of XML.

The all-important Document Type Definition (DTD) is covered in depth, but the still-unofficial alternative, XML Schema, is only briefly addressed. The author makes liberal use of graphics, tables, and code to demonstrate concepts along the way, keeping the reader engaged and on track. Ray also goes deep into some discussion of programming XML utilities with Perl.

Learning XML is a very readable introduction to XML for readers with existing knowledge of markup and Web technologies. It meets its goals very well--to deliver a broad perspective of XML and its potential. --Stephen W. Plain

Topics covered:

• XML overview
• XPointer
• XLink
• XHTML
• Presentation with Cascading Style Sheets (CSS)
• Document Type Definitions (DTDs)
• XML Schemas
• Transformation with XSLT
• Internationalization
• Simple API for XML (SAX)

With "XML in a Nutshell" beside your keyboard, you'll be able to:

Quick-reference syntax rules and usage examples for the core XML technologies, including XML, DTDs, Xpath, XSLT, SAX, and DOM

Develop an understanding of well-formed XML, DTDs, namespaces, Unicode, and W3C XML Schema

Gain a working knowledge of key technologies used for narrative XML documents such as web pages, books, and articles technologies like XSLT, Xpath, Xlink, Xpointer, CSS, and XSL-FO

Build data-intensive XML applications

Understand the tools and APIs necessary to build data-intensive XML applications and process XML documents, including the event-based Simple API for XML (SAX2) and the tree-oriented Document Object Model (DOM)

This powerful new edition is the comprehensive XML reference. Serious users of XML will find coverage on just about everything they need, from fundamental syntax rules, to details of DTD and XML Schema creation, to XSLT transformations, to APIs used for processing XML documents. "XML in a Nutshell" also covers XML 1.1, as well as updates to SAX2 and DOM Level 3 coverage. If you need explanation of how a technology works, or just need to quickly find the precise syntax for a particular piece, "XML in a Nutshell" puts theinformation at your fingertips.

Simply put, "XML in a Nutshell" is the critical, must-have reference for any XML developer.

• Supported by all major database systems, XML provides an easy, standardized method of transferring data between databases and to and from the Web, independent of the software in use
• Offers database programmers and data-driven Web developers detailed guidance on how to understand and work with XML as data
• Numerous hands-on, step-by-step examples help readers learn to simplify database work using XML
• Shows how to use XML to exchange data between multiple databases either internally or with external customers and partners
• Covers XML in popular databases including Oracle Database, SQL Server, and brief coverage of DB2 Database
• Covers basic syntax for XML, the XML DOM, and XSL – with an emphasis on database use, and native XML databases
• Additional topics covered include Native XML databases, XPath, XQuery, XLink, XPointer, DTDs, XML Schemas, among others

• Offering a unique approach to learning XML, this book walks readers through the process of building a complete, functional, end-to-end XML solution
• Featured case study is an online business product catalog that includes reports, data input/output, workflow, stylesheet formatting, RSS feeds, and integration with external services like Google, eBay, and Amazon
• The format of presenting a problem and working through the design to come up with a solution enables readers to understand how XML markup allows a business to share data across applications internally or with partners or customers even though they might not use the same applications

• As XML gains popularity, developers are looking to implement XML technologies in their line-of-business applications
• This book offers readers real-world insight into XML so that they can build the best possible applications
• Offers an in-depth look at XML and discusses XML tools, services (RSS, SOAP, REST, WSDL), programming (DOM, SAX, Ajax), and languages (.NET, Java, PHP)