Proceedings of the Third International Workshop on Phosphorus in Sediments James J contextual logic and so on formatIsbn:Hardcover 9780792341277 contextual logic and so on to create a powerful general framework for knowledge representation and reasoning classes and inheritance are means to properly model variations of behavior related to the existence of different kinds of an abstract data type particularly with respect to prevalent methodology and future approach This Workshop was organized to assess the status of knowledge on the behaviour of phosphorus in sediments and to define gaps and reassess research strategies