Knowledge means power - but only if it is available at the right time, the right place, and in the hands of the right people. Structured, engineered, repeatable methodsto gather, transport, andapplyknowledgearecollectivelycalledkno- edge management. Declarative programming strives for the ideal of programming by wish: the user states what he or she wants, and the computer ?gures out how to achieve it. Thus, declarative programming splits into two separate parts: methods for humans on how to write wishes, and algorithms for computers that ful?l these wishes....