XHTML — 25 free lessons

html written as strict xml · the discipline detour

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XHTML Tutorial

1. What is XHTML · HTML as XML 2. Why XHTML Existed · The Strictness Pitch 3. XHTML vs HTML · The Differences 4. XHTML Syntax Rules · The Five Musts 5. XHTML Doctype · The Required Header 6. All Tags Lowercase · The Case Rule 7. All Tags Must Close · Self-Closing Too 8. Proper Nesting · No Overlap Allowed 9. Attribute Values · Always Quoted 10. Boolean Attributes · Expanded Form 11. The Document Must Be Well-Formed 12. XHTML Validation · The Strict Parser 13. The XHTML Namespace · Xmlns 14. Content-Type · Application/Xhtml+xml 15. Fatal Errors · Why Parsers Gave up

XHTML Versions

16. XHTML 1.0 · Strict · Transitional · Frameset 17. XHTML 1.1 · Modularization 18. XHTML 2.0 · The Version That Never Shipped 19. XHTML 5 · The Polyglot Subset

XHTML Today

20. XML Stylesheets · Linking Xslt 21. Character Entities in XHTML 22. Why HTML5 Won · Pragmatism Over Purity 23. When XHTML Still Matters · E-Readers · Epub 24. Converting HTML to XHTML 25. References · Spec Links · Validators