XQuery : search across a variety of XML data / Priscilla Walmsley.

Format:

Book

Author/Creator:

Walmsley, Priscilla, author.

Language:

English

Subjects (All):

XML (Document markup language).

Query languages (Computer science).

Physical Description:

1 online resource (758 p.)

Edition:

2nd ed.

Place of Publication:

Sebastopol, CA : O'Reilly, 2015.

System Details:

text file

Summary:

The W3C XQuery 3.1 standard provides a tool to search, extract, and manipulate content, whether it's in XML, JSON or plain text. With this fully updated, in-depth tutorial, you’ll learn to program with this highly practical query language. Designed for query writers who have some knowledge of XML basics, but not necessarily advanced knowledge of XML-related technologies, this book is ideal as both a tutorial and a reference. You’ll find background information for namespaces, schemas, built-in types, and regular expressions that are relevant to writing XML queries.

Contents:

Copyright; Table of Contents; Preface; Contents of This Book; Reading the Syntax Diagrams; Conventions Used in This Book; Using Code Examples; Useful Functions; Safari® Books Online; We'd Like to Hear from You; Acknowledgments; Chapter 1. Introduction to XQuery; What Is XQuery?; Capabilities of XQuery; Uses for XQuery; Processing Scenarios; Easing into XQuery; Path Expressions; FLWORs; Adding XML Elements and Attributes; Adding Elements; Adding Attributes; Functions; Joins; Aggregating and Grouping Values; Chapter 2. XQuery Foundations; The Design and History of the XQuery Language

XQuery in ContextXQuery and XPath; XQuery Versus XSLT; XQuery Versus SQL; XQuery and XML Schema; Processing Queries; Input Documents; The Query; The Context; The Query Processor; The Results of the Query; The XQuery Data Model; Nodes; Atomic Values; Sequences; Types; Namespaces; Chapter 3. Expressions: XQuery Building Blocks; Categories of Expressions; Keywords and Names; Whitespace in Queries; Literals; Variables; Function Calls; Comments; Precedence and Parentheses; Comparison Expressions; General Comparisons; Value Comparisons; Node Comparisons; Conditional (if-then-else) Expressions

Conditional Expressions and Effective Boolean ValueNesting Conditional Expressions; Switch Expressions; Logical (and/or) Expressions; Precedence of Logical Expressions; Negating a Boolean Value; Chapter 4. Navigating XML by Using Paths; Path Expressions; Path Expressions and Context; Steps; Axes; Node Tests; Abbreviated Syntax; Other Expressions as Steps; Predicates; Comparisons in Predicates; Using Positions in Predicates; Using Multiple Predicates; More Complex Predicates; A Closer Look at Context; Working with the Context Node; Accessing the Root; Dynamic Paths; The Simple Map Operator

Chapter 5. Adding Elements and Attributes to ResultsIncluding Elements and Attributes from the Input Document; Direct Element Constructors; Containing Literal Characters; Containing Other Element Constructors; Containing Enclosed Expressions; Specifying Attributes Directly; Declaring Namespaces in Direct Constructors; Use Case: Modifying an Element from the Input Document; Direct Element Constructors and Whitespace; Computed Constructors; Computed Element Constructors; Computed Attribute Constructors; Use Case: Turning Content to Markup; Chapter 6. Selecting and Joining Using FLWORs

Selecting with Path ExpressionsFLWOR Expressions; The for Clause; The let Clause; The where Clause; The return Clause; The Scope of Variables; Quantified Expressions; Binding Multiple Variables; Selecting Distinct Values; Joins; Three-Way Joins; Outer Joins; Joins and Types; Chapter 7. Sorting and Grouping; Sorting in XQuery; The order by Clause; The sort Function; Document Order; Document Order Comparisons; Reversing the Order; Indicating That Order Is Not Significant; Grouping; Grouping Using the group by Clause; Aggregating Values; Ignoring "Missing" Values; Counting "Missing" Values

Aggregating on Multiple Values

Notes:

Includes index.

Description based on online resource; title from PDF title page (ebrary, viewed January 20, 2016).

Includes bibliographical references and index.

ISBN:

9781491915110

1491915110

9781491915080

1491915080

9781491915127

1491915129

OCLC:

932322836