"Querying XML with XQuery" introduces the new standard, W3C XQuery Recommendation. XQuery emerges as the de-facto XML query language that will deliver the promise of XML in the application integration and data integration fields. Simple complete examples introduce the essentials of XQuery to enable the reader to grasp its essence. The authors present complete cases with the use of XQuery in application integration and information integration deployments. This book also provides a crucial discussion of advanced topics of the language. "Querying XML with XQuery" is designed for XML, database and Java developers, as well as advanced-level students in computer science.