Preface

AAAI Conferences 

Welcome to the Workshop on Spatial and Temporal Reasoning at AAAI-07 in Vancouver, British Columbia. This workshop continues in the spirit of a series of such activities over the last fifteen years spanning related communities of researchers that study representing and reasoning about either space or time or both. In addition, the workshop has encouraged a mix of theory and applied work. Various basic representational problems in space (direction, location, proximity, geometry, intersection) and in time (coincidence, order, concurrency, overlap, granularity) attract repeated attention due to their fundamental and difficult nature. Beyond that, however, the richness of different ontologies, different applications, and different objectives assures that no small collection of solutions will serve to satisfy all needs.