This paper describes issues relating to the formation of a documentation structure for modelling spatial processes. The limitations and desirable attributes of such a structure are discussed with particular reference to the requirements of model designers and implementers. The definition of their structure is regarded as pivotal to the continued research and implementation of technology for modelling spatial processes previously conducted and published, in which extensive benefits were identified. In this paper, particular reference is made to highlight existing research in the area of model documentation that although requiring adaptation, may satisfy the specified criteria for the development of a generic system for modelling spatial processes.