"A visionary in the field of knowledge representation, John Sowa captures the current state of the art while introducing influential new ideas, such as his own concept of "frames" for representing knowledge - widely accepted by professionals and academics.". "This definitive new text offers broad and original coverage of the foundations of knowledge representation. Sowa integrates logic, philosophy, linguistics, and computer science into this study of knowledge and its translation to a computable form. The book emphasizes the logical principles that underlie the diverse techniques and notations of artificial intelligence, database design, and object-oriented programming."--BOOK JACKET.