Starting with an updated description of Allen's calculus

The book proceeds with a description of the main qualitative calculi which have been developed over the last two decades. It describes the connection of complexity issues to geometric properties.

Models and Formalisms

Models of the formalisms are described using the algebraic notion of weak representations of the associated algebras.

Extensions and Complexity

The book also includes a presentation of fuzzy extensions of qualitative calculi, and a description of the study of complexity in terms of clones of operations.