This paper presents a cognitive typology of reuse processes, and a cognitive typology of documenting processes. Empirical studies on design with reuse and on software documenting provide evidence for a generalized cognitive model. First, these studies emphasize the cyclical nature of design: cycles of planning, writing and revising occur. Second, natural language documentation follows the hierarchy of cognitive entities manipulated during design. Similarly software reuse involves exploiting various types of knowledge depending on the phase of design in which reuse is involved. We suggest that these observations can be explained based on cognitive models of text processing: the van Dijk and Kintsch (1983) model of text comprehension, and the Hayes and Flower (1980) model of text production. Based on our generalized cognitive model, we suggest a framework for documenting reusable components
