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XQuery [Englisch] [Taschenbuch]

Priscilla Walmsley
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Kurzbeschreibung

20. April 2007
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.

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Produktinformation

  • Taschenbuch: 510 Seiten
  • Verlag: O'Reilly & Associates; Auflage: 1 (20. April 2007)
  • Sprache: Englisch
  • ISBN-10: 0596006349
  • ISBN-13: 978-0596006341
  • Größe und/oder Gewicht: 3 x 17,1 x 22,9 cm
  • Durchschnittliche Kundenbewertung: 5.0 von 5 Sternen  Alle Rezensionen anzeigen (1 Kundenrezension)
  • Amazon Bestseller-Rang: Nr. 171.847 in Fremdsprachige Bücher (Siehe Top 100 in Fremdsprachige Bücher)
  • Komplettes Inhaltsverzeichnis ansehen

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Produktbeschreibungen

Synopsis

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; and 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.

Über den Autor und weitere Mitwirkende

Priscilla Walmsley serves as Managing Director of Datypic, a consultancy specializing in XML architecture and design, SOA and Web services implementation, and content management. She was a member of the W3C XML Schema Working Group from 1999 to 2004. She is the author of Definitive XML Schema (Prentice Hall), as well as the forthcoming XQuery from O'Reilly. In addition, she co-authored the book XML in Office 2003 with Charles Goldfarb. Priscilla lives (and usually works) in downtown Traverse City, Michigan.

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1 von 1 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen XQuery von priscilla walmsley 1. November 2010
Von Erepant
Format:Taschenbuch|Verifizierter Kauf
Literatur zu XQuery findet man heute noch nicht häufig.

Es ist kein Einsteiger Buch für XML insgesamt,
dieses Buch hatte mir bei meinen eigenen, ersten Gehversuchen zu XQuery aber sehr viel weiter geholfen.
Für mich war das Niveau genau richtig, deshalb volle 5 Punkte für dieses Buch.

Es kam sofort auf den Punkt mit "getting started", und erläuterte dann die einzelnen Problemfelder später im Detail.
Ein sehr gutes Tutorial für "XQuery", wenn man bereits einige Erfahrung zum Thema XML und XPath 1.0 mitbringt.

Ich hoffe, dass O'Reilly oder deren Autoren dann demnächst zum Thema XQuery noch ein entsprechendes "Kochbuch" zm Thema XQuery publiziert.
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Amazon.com: 4.5 von 5 Sternen  12 Rezensionen
19 von 19 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen Best XQuery book available to date! 26. April 2007
Von Amazon Customer - Veröffentlicht auf Amazon.com
Format:Taschenbuch|Verifizierter Kauf
I've had this XQuery book for about a week now and it has already helped me immensely! Priscilla Walmsley (who was a member of the W3C XML Schema Working Group and I believe the XQuery Working Group as well) is an excellent writer and teacher. Her writing style is clear and concise, as anyone who read her earlier Definitive XML Schema book already knows.

"XQuery" is roughly 2/3 tutorial and 1/3 reference (by page counts). The tutorial material is thoughtfully divided into 25 bite-size chapters. The topics progress nicely from an overview and basics to important concepts such as namespace handlng, modules and static typing. The book includes 5 chapters that focus on handling specific data types (e.g, "Working with Strings"). You don't have to know XSLT but knowing XPath may be helpful. OTOH, XPath is covered in Chap. 4. There is even a chapter targeted at SQL users. I also appreciate the carefully chosen running example that is representative of many XML structures. The book also benefits from special icons indicating tips, gotchas, and compatibility issues. Longtime XML geek Simon St.Laurent was the O'Reilly editor, which is another big plus.

Walmsley has also created an incredibly useful reference site of XQuery functions, both those defined by the W3C specs and numerous others that she wrote. Others may contribute as well. [...]

I have several older XQuery books by various publishers but this book is by far the best. I highly recommend it to web developers, database developers, and data architects with even a modest XML background.
17 von 18 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen Great tutorial and reference on XQuery 17. Mai 2007
Von calvinnme - Veröffentlicht auf Amazon.com
Format:Taschenbuch
The use of XML has become ubiquitous over the last five years, and thus a huge amount of data is now stored in XML, both as databases and as documents. XML data can include highly structured data such as sales figures, less structured data such as product catalogs, and unstructured data such as books. With such a variety of data stored as XML, in each case different elements of the data must be formatted and transformed in a particular way. This is where XQuery comes in. It is a query language that allows the user to select those XML data elements of interest, reorganize them, transform them, and finally return the results in a data structure. This book acts as an up-to-date tutorial and reference on this useful technology. There are plenty of examples shown that illustrate the concepts being presented. The following is a detailed description of the book's contents:

1. Introduction to XQuery - Provides the basic purpose and capabilities of XQuery and also acts as a quick introduction to its features. It provides a basic familiarity with the most commonly used kinds of expressions, without getting too bogged down in the details.

2. XQuery Foundations - a brief overview of the foundations of XQuery including its design, its place among XML-related standards, and its processing model. It also discusses the underlying data model behind XQuery and the use of types and namespaces in queries.

3. Expressions: XQuery Building Blocks - The basic unit of evaluation in XQuery is the expression. A query contains expressions that can be made up of a number of sub-expressions, which may themselves be composed from other sub-expressions. This chapter explains the XQuery syntax, and covers the most basic types of expressions that can be used in queries: literals, variables, function calls, and comments.

4. Navigating Input Documents Using Paths - Path expressions navigate input documents to select elements and attributes of interest. This chapter explains how to use these path expressions to select elements and attributes from an input document and apply predicates to filter those results. It also covers the different methods of accessing input documents.

5. Adding Elements and Attributes to Results - Queries often include some XML elements and attributes that structure the results. This chapter explains how you can create entirely new elements and attributes and include them in your results.

6. Selecting and Joining Using FLWORs - Describes the facilities in XQuery for selecting, filtering, and joining data from one or more input documents. Included is the syntax of FLWORs (for, let, where, order by, return) and quantitative expressions.

7. Sorting and Grouping - How to sort and group data from input documents. This chapter covers sorting in FLWORs, grouping results together, and calculating summary values using the aggregation functions.

8. Functions - Describes this useful feature of XQuery that allow a wide array of built-in functionality, as well as the ability to modularize and reuse parts of queries. There are two kinds of functions: built-in functions and user-defined functions, and this chapter looks at them both.

9. Advanced Queries - Describes syntax and techniques for some commonly requested query capabilities by showing you some creative ways to apply XQuery syntax.

10. Namespaces and XQuery - The first part provides a refresher on namespaces in XML input documents in general. Next the use of namespaces in queries is covered including how to declare and refer to them and how to control their appearance in your results.

11. A Closer Look at Types - Goes into detail on the set of built-in types in XQuery. A good explanation of the automatic type conversions performed by the processors and a description of the expressions that are relevant to type constructors, cast and castable expressions, and instance of expressions.

12. Queries, Prologs, and Modules - Discusses the structure of queries starting with the query prolog and its various declarations. The assembly of queries from multiple modules, declaration of global variables, and definition of external functions is then tackled.

13. Using Schemas with XQuery - Provides a brief overview of XML Schema. Discusses how schemas are used with queries by importing schema definitions and taking advantage of schema-defined types.

14. Static Typing - Static typing in XQuery means reporting all possible type errors at compile time instead of run time. Discussed in the context of aggressive error reporting.

15. Principles of Query Design - Discusses the goals of query design with particular attention paid to handling errors and tuning for performance.

16. Working with Numbers - Describes the four major numeric types, along with the operators and functions that act on numeric values. The operators include comparisons and arithmetic operations. The functions that operate on numeric values that are discussed include round and sum.

17. Working with Strings - Discusses constructing and comparing strings and provides an overview of the built-in functions that manipulate strings. It also explains related features such as whitespace handling and internationalization.

18. Regular Expressions - Probably already a familiar concept to the Unix-aware, this discusses the topic in context of the XQuery language.

19. Working with Dates, Times, and Durations - Explains the eleven date-related types used in XQuery and the functions and operators that act on them.

20. Working with Qualified Names, URIs, and IDs - Each of these types has unique properties and complexities that sets it apart from simple strings. Describes the functions and constructors that act on them.

21. Working with Other XML Components - Discusses comments, processing instructions, documents, and text nodes. CDATA sections and XML character and entity references are also covered in this chapter.

22. Additional XQuery-Related Standards - Discusses serialization, XQueryX, XQuery Updates, Full-Text search, and XQJ. These are peripheral standards that complement, but are not central to, the XQuery 1.0 language.

23. Implementation-Specific Features - Looks at some of the implementation-specific aspects of XQuery that provide customized functions and settings for specific use cases.

24. XQuery for SQL Users - Provides information for readers who are already using SQL and relational databases. It compares SQL and XQuery and also shows how to use them together.

25. XQuery for XSLT Users - The similarities and differences between XQuery and XSLT. This chapter also shows XSLT 1.0/XPath 1.0 users the differences and compatibility problems when moving to XQuery/XPath 2.0.

A. Built-in Function Reference

B. Built-in Types

C. Error Summary
9 von 9 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen First Impressions 23. Mai 2007
Von Marshal Dillon - Veröffentlicht auf Amazon.com
Format:Taschenbuch|Verifizierter Kauf
My first impression of this book is that it is fantastic. Just flip through the first chapter and you'll see references to code snippets and valuable explanations of XQuery. This book is what I was seeking. The author knows the reader has an interest in the subject and does not waste time explaining what XML is and why one would want to query it etc. This book is not selling the technology. It teaches it which is a lesson the author of "Querying XML" could learn from.

I am very happy thus far with this book.
3 von 3 Kunden fanden die folgende Rezension hilfreich
4.0 von 5 Sternen Good XQuery tutorial/reference 30. Januar 2008
Von Dan Arias - Veröffentlicht auf Amazon.com
Format:Taschenbuch|Verifizierter Kauf
I needed to come up to speed with an XML database server (Mark Logic) and I found this book very useful for learning how to use XQuery. It was concise and provided many good examples. The presentation of chapters was somewhat episodic--you had to read the later chapters to find out how some of the topics turned out. This was probably due to the newness and complexity of the topic. I wouldn't be surprised if there was a chapter reorg for the 2nd edition.

In my case, the book covers only XQuery and does not cover the XQuery extensions and specifics of the XML database system I was using. Walmsley's book makes a great companion to the vendor documentation.
3 von 3 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen A specific, valuable reference 8. Juli 2007
Von Midwest Book Review - Veröffentlicht auf Amazon.com
Format:Taschenbuch
XML programmers and database users will find Priscilla Walmsley's XQUERY a specific, valuable reference which is based on the Xquery 1.0 standards and which offers a basic tutorial on specifications and programming with the query language base. Query writers should have some knowledge of XML basics to use this, and can quickly progress into the 'advanced' category using an overview and tour of Xquery which includes guidelines for working with different types of data and an A-Z reference to the program's functions.
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