HTML

• DOCTYPE examples
  • eg 1
  • eg 2
  • eg 3
  • eg 4

XML

• Bach example (From W3's CSS tutorial)
  ⇒ source ⇒ style sheet

• Dog example ⇒ source ⇒ style sheet
  Dog without CSS ⇒ source
  Dog well-formed but with structure error ⇒ source
  Dog not well-formed ⇒ source

• XML Schema (XSD's)
  • Wikipedia's explanation
  • XSD (and DTD, etc.) generator

All from Professor R. Odendahl's Note