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Xpath and Xpointer

Xpath and Xpointer

John E Simpson

208 pages, parution le 24/09/2002

Résumé

Referring to specific information inside an XML document is a little like finding a needle in a haystack: how do you differentiate the information you need from everything else? XPath and XPointer are two closely related languages that play a key role in XML processing by allowing developers to find these needles and manipulate embedded information. XPath describes a route for finding specific items by defining a path through the hierarchy of an XML document, abstracting only the information that's relevant for identifying the data. XPointer extends XPath to identify more complex parts of documents. The two technologies are critical for developers seeking needles in haystacks in various types of processing.
XPath and XPointer fills an essential need for XML developers by focusing directly on a critical topic that has been covered only briefly. Written by John Simpson, an author with considerable XML experience, the book offers practical knowledge of the two languages that underpin XML, XSLT and XLink. XPath and XPointer cuts through basic theory and provides real-world examples that you can use right away.
Written for XML and XSLT developers and anyone else who needs to address information in XML documents, the book assumes a working knowledge of XML and XSLT. It begins with an introduction to XPath basics. You'll learn about location steps and paths, XPath functions and numeric operators. Once you've covered XPath in depth, you'll move on to XPointer--its background, syntax, and forms of addressing. By the time you've finished the book, you'll know how to construct a full XPointer (one that uses an XPath location path to address document content) and completely understand both the XPath and XPointer features it uses.
XPath and XPointer contains material on the forthcoming XPath 2.0 spec and EXSLT extensions, as well as versions 1.0 of both XPath and XPointer. A succinct but thorough hands-on guide, no other book on the market provides comprehensive information on these two key XML technologies in one place.

Contents

1. Introducing XPath and XPointer
     Why XPath and XPointer?
     Antecedents/History
     XPath, XPointer, and Other XML-Related Specs
     XPath and XPointer Versus XQuery

2. XPath Basics
     The Node Tree: An Introduction
     XPath Expressions
     XPath Data Types
     Nodes and Node-Sets
     Node-Set Context
     String-Values

3. Location Steps and Paths
     XPath Expressions
     Location Paths
     Location Steps
     Compound Location Paths Revisited

4. XPath Functions and Numeric Operators
     Introduction to Functions
     XPath Function Types
     XPath Numeric Operators

5. XPath in Action
     XPath Visualiser: Some Background
     Sample XML Document
     General to Specific, Common to Far-Out

6. XPath 2.0
     General Goals
     Specific Requirements

7. XPointer Background
     XPointer and Media types
     Some Definitions
     The Framework
     Error Types
     Encoding and Escaping Characters in XPointer

8. XPointer Syntax
     Shorthand Pointers
     Scheme-Based XPointer Syntax
     Using XPointers in a URI

9. XPointer Beyond XPath
     Why Extend XPath?
     Points and Ranges
     XPointer Extensions to Document Order
     XPointer Functions

A. Extension Functions for XPath in XSLT

Caractéristiques techniques

  PAPIER
Éditeur(s) O'Reilly
Auteur(s) John E Simpson
Parution 24/09/2002
Nb. de pages 208
Format 17,8 x 23,2
Couverture Broché
Poids 345g
Intérieur Noir et Blanc
EAN13 9780596002916
ISBN13 978-0-596-00291-6

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