Once upon a time...

... we had the hypertext

• A new way to access information
  • much more natural
  • emphasis upon associative aspects
  • different information types mixed
• A very simple model
  • nodes: data
  • links: associative component
• Links
  • the true richness of the hypertext
  • how many? (cognitive overhead vs. sequential reading)
  • extensional (explicitly stored) and intensional (derived from the context)
  • semantically typed