Cooperative memory structures and commonsense knowledge for planning

Here we present a memory-based planning system in which the memory is divided into three components namely the memory of skeletons, the memory of properties, and the memory of secondary objects. The planning and domain knowledge is distributed over these components which interact with each other in producing a plan. A skeleton is organized using a packaging hierarchy. An abstraction hierarchy is used in organizing the other two memories. A plan is generated in a hierarchical fashion by unfolding a suitable skeleton with the aid of the other two memories. The culinary domain has been taken up for system's implementation. The system utilizes some commonsense knowledge of the domain to adapt known plans to user requirements. This knowledge is represented in the form of rules.