Semantic Web

What can it represent?

The vision

Anything.

... provide a language that expresses both data and rules for reasoning about the data .... Berners-Lee 2001

We make the language for the rules as expressive as needed to allow the Web to reason as widely as desired. Berners-Lee 2001

... powerful enough to describe complex properties of objects .... Berners-Lee 2001

Realistic?

People are often unwilling or unable to say exactly what they know, believe, feel, and want. Marshall 2003

Remember "regularly constituted court" and "because of age".