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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.

This second edition provides:

• A high-level overview and quick tour of XQuery
• New chapters on higher-order functions, maps, arrays, and JSON
• A carefully paced tutorial that teaches XQuery without being bogged down by the details
• Advanced concepts for taking advantage of modularity, namespaces, typing, and schemas
• Guidelines for working with specific types of data, such as numbers, strings, dates, URIs, maps and arrays
• XQuery's implementation-specific features and its relationship to other standards including SQL and XSLT
• A complete alphabetical reference to the built-in functions, types, and error messages

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 XQuery from O'Reilly and Definitive XML Schema (Prentice Hall). In addition, she co-authored the book Web Service Contract Design and Versioning for SOA. Priscilla lives (and usually works) in downtown Traverse City, Michigan.