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Learning Paths now just $149. Stop hacking your way through the underbrush - we've cleared the way. See the paths

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XQuery

Search Across a Variety of XML Data

By Priscilla Walmsley

Publisher: O'Reilly Media

Final Release Date: March 2007

Pages: 512

With the XQuery 1.0 standard, you finally have a tool that will make it much easier to search, extract and manipulate information from XML content stored in databases. This in-depth tutorial not only walks you through the XQuery specification, but also teaches you how to program with this widely anticipated query language.

XQuery is for query writers who have some knowledge of XML basics, but not necessarily advanced knowledge of XML-related technologies. It can be used both as a tutorial, by reading cover to cover, and as a reference, by using the comprehensive index and appendixes. Either way, you will find the background knowledge in namespaces, schemas, built-in types and regular expressions that is relevant to writing XML queries. This book provides:

A high-level overview and quick tour of XQuery
Information to write sophisticated queries, without being bogged down by the details of types, namespaces, and schemas
Advanced concepts for users who want to take advantage of modularity, namespaces, typing and schemas
Guidelines for working with specific types of data, such as numbers, strings, dates, URIs and processing instructions
A complete alphabetical reference to the built-in functions and types

You will also learn about XQuery's support for filtering, sorting, and grouping data, as well as how to use FLWOR expressions, XPath, and XQuery tools for extracting and combining information. With this book, you will discover how to apply all of these tools to a wide variety of data sources, and how to recombine information from multiple sources into a single final output result.

Whether you're coming from SQL, XSLT, or starting from scratch, this carefully paced tutorial takes you through the final 1.0 standard in detail.

Chapter 1 Introduction to XQuery
1. What Is XQuery?
2. Easing into XQuery
3. Path Expressions
4. FLWORs
5. Adding XML Elements and Attributes
6. Functions
7. Joins
8. Aggregating and Grouping Values
Chapter 2 XQuery Foundations
1. The Design of the XQuery Language
2. XQuery in Context
3. Processing Queries
4. The XQuery Data Model
5. Types
6. Namespaces
Chapter 3 Expressions: XQuery Building Blocks
1. Categories of Expressions
2. Keywords and Names
3. Whitespace in Queries
4. Literals
5. Variables
6. Function Calls
7. Comments
8. Evaluation Order and Parentheses
9. Comparison Expressions
10. Conditional (if-then-else) Expressions
11. Logical (and/or) Expressions
Chapter 4 Navigating Input Documents Using Paths
1. Path Expressions
2. Predicates
3. Dynamic Paths
4. Input Documents
5. A Closer Look at Context
Chapter 5 Adding Elements and Attributes to Results
1. Including Elements and Attributes from the Input Document
2. Direct Element Constructors
3. Computed Constructors
Chapter 6 Selecting and Joining Using FLWORs
1. Selecting with Path Expressions
2. FLWOR Expressions
3. Quantified Expressions
4. Selecting Distinct Values
5. Joins
Chapter 7 Sorting and Grouping
1. Sorting in XQuery
2. Grouping
3. Aggregating Values
Chapter 8 Functions
1. Built-in Versus User-Defined Functions
2. Calling Functions
3. User-Defined Functions
Chapter 9 Advanced Queries
1. Copying Input Elements with Modifications
2. Working with Positions and Sequence Numbers
3. Combining Results
4. Using Intermediate XML Documents
Chapter 10 Namespaces and XQuery
1. XML Namespaces
2. Namespaces and XQuery
3. Namespace Declarations in Queries
4. Controlling Namespace Declarations in Your Results
Chapter 11 A Closer Look at Types
1. The XQuery Type System
2. The Built-in Types
3. Types, Nodes, and Atomic Values
4. Type Checking in XQuery
5. Automatic Type Conversions
6. Sequence Types
7. Constructors and Casting
Chapter 12 Queries, Prologs, and Modules
1. Structure of a Query: Prolog and Body
2. Assembling Queries from Multiple Modules
3. Variable Declarations
4. Declaring External Functions
Chapter 13 Using Schemas with XQuery
1. What Is a Schema?
2. Why Use Schemas with Queries?
3. W3C XML Schema: A Brief Overview
4. In-Scope Schema Definitions
5. Schema Validation and Type Assignment
6. Sequence Types and Schemas
Chapter 14 Static Typing
1. What Is Static Typing?
2. The Typeswitch Expression
3. The Treat Expression
4. Type Declarations
5. The zero-or-one, one-or-more, and exactly-one Functions
Chapter 15 Principles of Query Design
1. Query Design Goals
2. Clarity
3. Modularity
4. Robustness
5. Error Handling
6. Performance
Chapter 16 Working with Numbers
1. The Numeric Types
2. Constructing Numeric Values
3. Comparing Numeric Values
4. Arithmetic Operations
5. Functions on Numbers
Chapter 17 Working with Strings
1. The xs:string Type
2. Constructing Strings
3. Comparing Strings
4. Substrings
5. Finding the Length of a String
6. Concatenating and Splitting Strings
7. Manipulating Strings
8. Whitespace and Strings
9. Internationalization Considerations
Chapter 18 Regular Expressions
1. The Structure of a Regular Expression
2. Representing Individual Characters
3. Representing Any Character
4. Representing Groups of Characters
5. Character Class Expressions
6. Reluctant Quantifiers
7. Anchors
8. Back-References
9. Using Flags
10. Using Sub-Expressions with Replacement Variables
Chapter 19 Working with Dates, Times, and Durations
1. The Date and Time Types
2. The Duration Types
3. Extracting Components of Dates, Times, and Durations
4. Using Arithmetic Operators on Dates, Times, and Durations
5. The Date Component Types
Chapter 20 Working with Qualified Names, URIs, and IDs
1. Working with Qualified Names
2. Working with URIs
3. Working with IDs
Chapter 21 Working with Other XML Components
1. XML Comments
2. Processing Instructions
3. Documents
4. Text Nodes
5. XML Entity and Character References
6. CDATA Sections
Chapter 22 Additional XQuery-Related Standards
1. Serialization
2. XQueryX
3. XQuery Update Facility
4. Full-Text Search
5. XQuery API for Java (XQJ)
Chapter 23 Implementation-Specific Features
1. Conformance
2. XML Version Support
3. Setting the Query Context
4. Option Declarations and Extension Expressions
5. Specifying Serialization Parameters
Chapter 24 XQuery for SQL Users
1. Relational Versus XML Data Models
2. Comparing SQL Syntax with XQuery Syntax
3. Combining SQL and XQuery
4. SQL/XML
Chapter 25 XQuery for XSLT Users
1. XQuery and XPath
2. XQuery Versus XSLT
3. Differences Between XQuery 1.0/XPath 2.0 and XPath 1.0

Appendix A Built-in Function Reference
Appendix B Built-in Types
1. xs:anyAtomicType
2. xs:anyType
3. xs:anyURI
4. xs:base64Binary
5. xs:boolean
6. xs:byte
7. xs:date
8. xs:dateTime
9. xs:dayTimeDuration
10. xs:decimal
11. xs:double
12. xs:duration
13. xs:ENTITIES
14. xs:ENTITY
15. xs:float
16. xs:gDay
17. xs:gMonth
18. xs:gMonthDay
19. xs:gYear
20. xs:gYearMonth
21. xs:hexBinary
22. xs:ID
23. xs:IDREF
24. xs:IDREFS
25. xs:int
26. xs:integer
27. xs:language
28. xs:long
29. xs:Name
30. xs:NCName
31. xs:negativeInteger
32. xs:NMTOKEN
33. xs:NMTOKENS
34. xs:nonNegativeInteger
35. xs:nonPositiveInteger
36. xs:normalizedString
37. xs:NOTATION
38. xs:positiveInteger
39. xs:QName
40. xs:short
41. xs:string
42. xs:time
43. xs:token
44. xs:unsignedByte
45. xs:unsignedInt
46. xs:unsignedLong
47. xs:unsignedShort
48. xs:untyped
49. xs:untypedAtomic
50. xs:yearMonthDuration
Appendix C Error Summary
1. FOAR0001
2. FOAR0002
3. FOCA0001
4. FOCA0002
5. FOCA0003
6. FOCA0005
7. FOCA0006
8. FOCH0001
9. FOCH0002
10. FOCH0003
11. FOCH0004
12. FODC0001
13. FODC0002
14. FODC0003
15. FODC0004
16. FODC0005
17. FODT0001
18. FODT0002
19. FODT0003
20. FOER0000
21. FONS0004
22. FONS0005
23. FORG0001
24. FORG0002
25. FORG0003
26. FORG0004
27. FORG0005
28. FORG0006
29. FORG0008
30. FORG0009
31. FORX0001
32. FORX0002
33. FORX0003
34. FORX0004
35. FOTY0012
36. SENR0001
37. SEPM0004
38. SEPM0009
39. SEPM0010
40. SEPM0016
41. SERE0003
42. SERE0005
43. SERE0006
44. SERE0008
45. SERE0012
46. SERE0014
47. SERE0015
48. SESU0007
49. SESU0011
50. SESU0013
51. XPDY0002
52. XPDY0050
53. XPST0001
54. XPST0003
55. XPST0005
56. XPST0008
57. XPST0010
58. XPST0017
59. XPST0051
60. XPST0080
61. XPST0081
62. XPTY0004
63. XPTY0018
64. XPTY0019
65. XPTY0020
66. XQDY0025
67. XQDY0026
68. XQDY0027
69. XQDY0041
70. XQDY0044
71. XQDY0061
72. XQDY0064
73. XQDY0072
74. XQDY0074
75. XQDY0084
76. XQDY0091
77. XQDY0092
78. XQST0009
79. XQST0012
80. XQST0013
81. XQST0016
82. XQST0022
83. XQST0031
84. XQST0032
85. XQST0033
86. XQST0034
87. XQST0035
88. XQST0036
89. XQST0038
90. XQST0039
91. XQST0040
92. XQST0045
93. XQST0046
94. XQST0047
95. XQST0048
96. XQST0049
97. XQST0054
98. XQST0055
99. XQST0057
100. XQST0058
101. XQST0059
102. XQST0060
103. XQST0065
104. XQST0066
105. XQST0067
106. XQST0068
107. XQST0069
108. XQST0070
109. XQST0071
110. XQST0073
111. XQST0075
112. XQST0076
113. XQST0079
114. XQST0085
115. XQST0087
116. XQST0088
117. XQST0089
118. XQST0090
119. XQST0093
120. XQTY0024
121. XQTY0030
122. XQTY0086
Colophon

Title:

XQuery

By:

Priscilla Walmsley

Publisher:

O'Reilly Media

Formats:

Print
Safari Books Online

Print:

March 2007

Pages:

512

Print ISBN:

978-0-596-00634-1

| ISBN 10:

0-596-00634-9

Table of Contents

Product Details

Colophon

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Clever introduction, comprehensive reference, all round solid work.

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Comments about oreilly XQuery:

This is a good title for those interested in XQuery. The author takes pains to keep the subject matter apposite. Each chapter restricts itself to a narrow subset of XQuery before moving on, thus resisting the temptation to branch out into other features which might labour the reader.

Perhaps more focus could have been given to individual implementations, as Saxon is given undue prominence as the implementation of choice. However, this is probably being a little fussy, as most readers will have an implementation in mind before even considering a text on XQuery (if they don't, they should).

There are plenty of other titles which would benefit greatly from following this title's general approach.

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Chapter 1 Introduction to XQuery

What Is XQuery?

Easing into XQuery

Path Expressions

FLWORs

Adding XML Elements and Attributes

Functions

Joins

Aggregating and Grouping Values

Chapter 2 XQuery Foundations

The Design of the XQuery Language

XQuery in Context

Processing Queries

The XQuery Data Model

Types

Namespaces

Chapter 3 Expressions: XQuery Building Blocks

Categories of Expressions

Keywords and Names

Whitespace in Queries

Literals

Variables

Function Calls

Comments

Evaluation Order and Parentheses

Comparison Expressions

Conditional (if-then-else) Expressions

Logical (and/or) Expressions

Chapter 4 Navigating Input Documents Using Paths

Path Expressions

Predicates

Dynamic Paths

Input Documents

A Closer Look at Context

Chapter 5 Adding Elements and Attributes to Results

Including Elements and Attributes from the Input Document

Direct Element Constructors

Computed Constructors

Chapter 6 Selecting and Joining Using FLWORs

Selecting with Path Expressions

FLWOR Expressions

Quantified Expressions

Selecting Distinct Values

Joins

Chapter 7 Sorting and Grouping

Sorting in XQuery

Grouping

Aggregating Values

Chapter 8 Functions

Built-in Versus User-Defined Functions

Calling Functions

User-Defined Functions

Chapter 9 Advanced Queries

Copying Input Elements with Modifications

Working with Positions and Sequence Numbers

Combining Results

Using Intermediate XML Documents

Chapter 10 Namespaces and XQuery

XML Namespaces

Namespaces and XQuery

Namespace Declarations in Queries

Controlling Namespace Declarations in Your Results

Chapter 11 A Closer Look at Types

The XQuery Type System

The Built-in Types

Types, Nodes, and Atomic Values

Type Checking in XQuery

Automatic Type Conversions

Sequence Types

Constructors and Casting

Chapter 12 Queries, Prologs, and Modules

Structure of a Query: Prolog and Body

Assembling Queries from Multiple Modules

Variable Declarations

Declaring External Functions

Chapter 13 Using Schemas with XQuery

What Is a Schema?

Why Use Schemas with Queries?

W3C XML Schema: A Brief Overview

In-Scope Schema Definitions