Why use this data structure?

• It enables attribute values to be retrieved quickly
  • assertions are indexed by the entities
  • binary predicates are indexed by first argument. E.g. team(Mike-Hall , Cardiff).
• Properties of relations are easy to describe .
• It allows ease of consideration as it embraces aspects of object oriented programming.

So called because:

• A slot is an attribute value pair in its simplest form.
• A filler is a value that a slot can take -- could be a numeric, string (or any data type) value or a pointer to another slot.
• A weak slot and filler structure does not consider the content of the representation.

We will study two types:

• Semantic Nets.
• Frames.