The processing necessary for high level vision is considered here. The manipulation of symbolic entities, each with values, properties, and constrained relationships to other symbolic entities is a major component. To perform recognition, the system operates in a guided globular reasoning framework. Further, concepts for a vision system which center on deduction are inherently distributed and desirable for an asynchronous systolic array architecture. The concepts presented in this paper, which are normally inaccessible, ease the tasks of processing spatial knowledge and modeling a modularly structured system.