TAILIEUCHUNG - Lecture Introduction to XML: XPath - XML Path Language

After studying this chapter you will be able to: Describe the reasons for using XPath, define the components and constructs that make up the XML Path Language, write simple XPath expressions, identify abbreviated XPath expressions, describe how to partition the XPath document, define the current status of XPath in industry. | Welcome to XPath -XML Path Language Copyright IBM Corporation 2004 Course materials may not be reproduced in whole or in part without the prior written permission of IBM. Unit Objectives After completing this unit you should be able to Describe the reasons for using XPath Define the components and constructs that make up the XML Path Language Write simple XPath expressions Identify abbreviated XPath expressions Describe how to partition the XPath document Define the current status of XPath in industry Copyright IBM Corporation 2004 What Is XPath A specification for querying an XML document. - Does not have an implementation independent of other standards technologies. - Used by XSLT XPointer and other emerging technologies such as XQuery. Often when processing XML we need to address locate a portion of or elements of the document which meet specified criteria. - Example In XML for a book on Java find the chapters with JDBC in the title. Provides the ability to address any slice of an XML document in any direction. - Either forwards backwards or sideways. W3C Recommendation Nov. 16 1999 . Copyright IBM Corporation .

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• Introduction to XML
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