Book Image

Processing XML documents with Oracle JDeveloper 11g

Book Image

Processing XML documents with Oracle JDeveloper 11g

Overview of this book

XML is an open standard for creating markup languages and exchanging structured documents and data over the Internet. JDeveloper 11g presents an effective, quick, and easy-to-use means of processing XML documents. Inspired by the author's previous XML articles for the Oracle community, this expanded hands-on tutorial guides newcomers and intermediate users through JDeveloper 11g and XML document development. It offers up-to-date information on working with the latest version of JDeveloper, and brand new information on JAXB 2.0 support in JDeveloper 11g. Filled with illustrations, explanatory tables, and comprehensive instructions, this book walks the reader through the wide assortment of JDeveloper's capabilities. Oracle's JDeveloper 11g is an Integrated Development Environment that provides a visual and declarative approach to application development. Over the course of 14 chapters, readers will get hands-on with JDeveloper as the comprehensive and self-contained tutorials provide clear instruction on the key XML tasks that JDeveloper can accomplish. Filled with practical information and illustrated examples, this book shows the reader how to create, parse, and store XML documents quickly, as well as providing step-by-step instructions on how to construct an XML schema and use the schema to validate an XML document. Oracle's XML Developer Kit (XDK) offers a set of components, tools, and utilities for developing XML-based applications, and developers will find the detailed XDK coverage invaluable. Later chapters are given over to using XPath, transforming XML with XSLT, and using the JSTL XML Tag Library. Moving through the book, a chapter on the JAXB 2.0 API shows you how to bind, marshal and unmarshal XML documents, before we finally delve into comparing XML documents, and converting them into PDF and Excel formats. In all, this book will enable the reader to gain a good and wide-ranging understanding of what JDeveloper has to offer for XML processing.
Table of Contents (19 chapters)
Processing XML documents with Oracle JDeveloper 11g
Credits
About the Author
About the Reviewers
Preface

XPath search


In this section, we shall select nodes from the example XML document, catalog.xml, with the XPath Search tool of JDeveloper 11g. The XPath Search tool consists of an Expression field for specifying an XPath expression. Specify an XPath expression and click on OK to select nodes matching the XPath expression. The XPath Search tool has the provision to search for nodes in a specific namespace. An XML namespace is a collection of element and attribute names that are identified by a URI reference. Namespaces are specified in an XML document using namespace declarations. A namespace declaration is an xmlns-prefixed attribute in an element that consists of a namespace prefix in the attribute name with the namespace URI as the attribute value.

If you want to select nodes in a specific namespace or nodes from different namespaces, first add the namespace Prefix and URI to the XPath Search tool using the Add button. Subsequently, include namespace prefixes in the XPath expression....