Chapter 1. Introduction

XML, the eXtensible Markup Language, is the standard format for exchanging information between different systems, applications, and organizations. XML is also the underlying data format for many web applications, Service-Oriented Architectures (SOA), and message-based transaction processing systems. Enterprise application integration (EAI), enterprise information integration (EII), web services, the enterprise message bus (ESB), and standardization efforts in many vertical industries all rely on XML as the underlying technology for data exchange.

Organizations as well as entire industries have standardized XML Schemas to promote and simplify data exchange and are evolving those schemas to meet changing business ...

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