With XQuery, you finally have a tool that will make it much easier to search, extract and manipulate information from XML content stored in databases. Updated for XQuery 3.0, this in-depth tutorial not only walks you through the XQuery specification, but also teaches you how to program with this highly practical 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.