introduction spatial planning concepts have become prominent in discussions and strategies that focus on regional and rural development. at the heart of this policy framework is an understanding that competition between regions is one of the primary driving forces influencing social and economic development and hence cohesion. it is also understood that some regions have greater advantages in t...

This paper presents a taxonomy of 19 cognitive criteria for judging what constitutes effective representational systems, particularly for knowledge rich topics. Two classes of cognitive criteria are discussed. The first concerns access to concepts by reading and making inferences from external representations. The second class addresses the generation and manipulation of external representation...