- Web content is mostly HTML + image/sound/video/program...
- HTML/XML is textual + structure (title, heading, list..)
- Markup can be rendered in many ways:
- graphical screen (with or without sound)
- textual screen
- speech synthetizer
- braille terminal
- etc.
- Document presentation is/should be separate from structure (CSS)
- "Richer" parts can be rendered using alternate formats
(e.g. descriptive text for image, linearized version of TABLE,
etc)