Simple relational knowledge

The simplest way of storing facts is to use a relational method where each fact about a set of objects is set out systematically in columns. This representation gives little opportunity for inference, but it can be used as the knowledge basis for inference engines.

• Simple way to store facts.
• Each fact about a set of objects is set out systematically in columns (Fig. 7).
• Little opportunity for inference.
• Knowledge basis for inference engines.

  
Figure: Simple Relational Knowledge

We can ask things like:

• Who is dead?
• Who plays Jazz/Trumpet etc.?

This sort of representation is popular in database systems.