XQuery Kick Start

Chapter 6. Working with the XPath 2.0 Data Model

by Per Bothner

IN THIS CHAPTER

• XML Infosets

• Node Values and Types

• Types and Type Systems

• Schemas and Complex Types

• Validation Produces Type Annotations

• Sequence Types

• Static Typing

• In Brief

XML Infosets

The XQuery data model is based on the XML Information Set standard (W3C Recommendation October 24, 2001, http://www.w3.org/TR/xml-infoset). It rather abstractly defines the information content of an XML document as a document item that contains nested element items, which in turn contain namespaces, attributes, characters, and other items. This is a conceptual standard: It does not define any file formats or programming interfaces, but rather it defines the interpretation of an XML file. It is intended to be ...