Querying XML

Chapter 7

Managing XML: Transforming and Connecting

7.1 Introduction

XML documents rarely exist in a vacuum. As you read in Section 6.6, “The Post-Schema-Validation Infoset (PSVI),” and as you will see in Chapter 10, “Introduction to XQuery 1.0,” XML documents being queried often conform to (that is, are validated against) an XML Schema and they may be transformed into an instance of the XQuery Data Model.

XML documents interact in many ways with their environment. For instance, they can be transformed from one structure to a different structure, or they can be transformed into some user-friendly format such as HTML¹ or PDF.² They are frequently modularized to place some information into one physical resource (e.g., a file) and other information ...