• Structure of a text = hierarchical tree (chapter/section/subsection)

• Markup to clearly reflect structure, no presentation allowed

• Powerful and flexible processing tools, designed for the job

Conclusion:

• XML (eXtensible Markup Language) – simple syntax

• XSL (eXstensible Stylesheet Language) – declarative, complex and powerful

• An “XML application” – design of the elements (“tags”)